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path: root/drivers/usb/gadget/udc/renesas_usb3.c
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Diffstat (limited to 'drivers/usb/gadget/udc/renesas_usb3.c')
-rw-r--r--drivers/usb/gadget/udc/renesas_usb3.c2999
1 files changed, 2999 insertions, 0 deletions
diff --git a/drivers/usb/gadget/udc/renesas_usb3.c b/drivers/usb/gadget/udc/renesas_usb3.c
new file mode 100644
index 000000000..32c9e3692
--- /dev/null
+++ b/drivers/usb/gadget/udc/renesas_usb3.c
@@ -0,0 +1,2999 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Renesas USB3.0 Peripheral driver (USB gadget)
+ *
+ * Copyright (C) 2015-2017 Renesas Electronics Corporation
+ */
+
+#include <linux/debugfs.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/err.h>
+#include <linux/extcon-provider.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+#include <linux/sizes.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/sys_soc.h>
+#include <linux/uaccess.h>
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/of.h>
+#include <linux/usb/role.h>
+
+/* register definitions */
+#define USB3_AXI_INT_STA 0x008
+#define USB3_AXI_INT_ENA 0x00c
+#define USB3_DMA_INT_STA 0x010
+#define USB3_DMA_INT_ENA 0x014
+#define USB3_DMA_CH0_CON(n) (0x030 + ((n) - 1) * 0x10) /* n = 1 to 4 */
+#define USB3_DMA_CH0_PRD_ADR(n) (0x034 + ((n) - 1) * 0x10) /* n = 1 to 4 */
+#define USB3_USB_COM_CON 0x200
+#define USB3_USB20_CON 0x204
+#define USB3_USB30_CON 0x208
+#define USB3_USB_STA 0x210
+#define USB3_DRD_CON(p) ((p)->is_rzv2m ? 0x400 : 0x218)
+#define USB3_USB_INT_STA_1 0x220
+#define USB3_USB_INT_STA_2 0x224
+#define USB3_USB_INT_ENA_1 0x228
+#define USB3_USB_INT_ENA_2 0x22c
+#define USB3_STUP_DAT_0 0x230
+#define USB3_STUP_DAT_1 0x234
+#define USB3_USB_OTG_STA(p) ((p)->is_rzv2m ? 0x410 : 0x268)
+#define USB3_USB_OTG_INT_STA(p) ((p)->is_rzv2m ? 0x414 : 0x26c)
+#define USB3_USB_OTG_INT_ENA(p) ((p)->is_rzv2m ? 0x418 : 0x270)
+#define USB3_P0_MOD 0x280
+#define USB3_P0_CON 0x288
+#define USB3_P0_STA 0x28c
+#define USB3_P0_INT_STA 0x290
+#define USB3_P0_INT_ENA 0x294
+#define USB3_P0_LNG 0x2a0
+#define USB3_P0_READ 0x2a4
+#define USB3_P0_WRITE 0x2a8
+#define USB3_PIPE_COM 0x2b0
+#define USB3_PN_MOD 0x2c0
+#define USB3_PN_RAMMAP 0x2c4
+#define USB3_PN_CON 0x2c8
+#define USB3_PN_STA 0x2cc
+#define USB3_PN_INT_STA 0x2d0
+#define USB3_PN_INT_ENA 0x2d4
+#define USB3_PN_LNG 0x2e0
+#define USB3_PN_READ 0x2e4
+#define USB3_PN_WRITE 0x2e8
+#define USB3_SSIFCMD 0x340
+
+/* AXI_INT_ENA and AXI_INT_STA */
+#define AXI_INT_DMAINT BIT(31)
+#define AXI_INT_EPCINT BIT(30)
+/* PRD's n = from 1 to 4 */
+#define AXI_INT_PRDEN_CLR_STA_SHIFT(n) (16 + (n) - 1)
+#define AXI_INT_PRDERR_STA_SHIFT(n) (0 + (n) - 1)
+#define AXI_INT_PRDEN_CLR_STA(n) (1 << AXI_INT_PRDEN_CLR_STA_SHIFT(n))
+#define AXI_INT_PRDERR_STA(n) (1 << AXI_INT_PRDERR_STA_SHIFT(n))
+
+/* DMA_INT_ENA and DMA_INT_STA */
+#define DMA_INT(n) BIT(n)
+
+/* DMA_CH0_CONn */
+#define DMA_CON_PIPE_DIR BIT(15) /* 1: In Transfer */
+#define DMA_CON_PIPE_NO_SHIFT 8
+#define DMA_CON_PIPE_NO_MASK GENMASK(12, DMA_CON_PIPE_NO_SHIFT)
+#define DMA_COM_PIPE_NO(n) (((n) << DMA_CON_PIPE_NO_SHIFT) & \
+ DMA_CON_PIPE_NO_MASK)
+#define DMA_CON_PRD_EN BIT(0)
+
+/* LCLKSEL */
+#define LCLKSEL_LSEL BIT(18)
+
+/* USB_COM_CON */
+#define USB_COM_CON_CONF BIT(24)
+#define USB_COM_CON_PN_WDATAIF_NL BIT(23)
+#define USB_COM_CON_PN_RDATAIF_NL BIT(22)
+#define USB_COM_CON_PN_LSTTR_PP BIT(21)
+#define USB_COM_CON_SPD_MODE BIT(17)
+#define USB_COM_CON_EP0_EN BIT(16)
+#define USB_COM_CON_DEV_ADDR_SHIFT 8
+#define USB_COM_CON_DEV_ADDR_MASK GENMASK(14, USB_COM_CON_DEV_ADDR_SHIFT)
+#define USB_COM_CON_DEV_ADDR(n) (((n) << USB_COM_CON_DEV_ADDR_SHIFT) & \
+ USB_COM_CON_DEV_ADDR_MASK)
+#define USB_COM_CON_RX_DETECTION BIT(1)
+#define USB_COM_CON_PIPE_CLR BIT(0)
+
+/* USB20_CON */
+#define USB20_CON_B2_PUE BIT(31)
+#define USB20_CON_B2_SUSPEND BIT(24)
+#define USB20_CON_B2_CONNECT BIT(17)
+#define USB20_CON_B2_TSTMOD_SHIFT 8
+#define USB20_CON_B2_TSTMOD_MASK GENMASK(10, USB20_CON_B2_TSTMOD_SHIFT)
+#define USB20_CON_B2_TSTMOD(n) (((n) << USB20_CON_B2_TSTMOD_SHIFT) & \
+ USB20_CON_B2_TSTMOD_MASK)
+#define USB20_CON_B2_TSTMOD_EN BIT(0)
+
+/* USB30_CON */
+#define USB30_CON_POW_SEL_SHIFT 24
+#define USB30_CON_POW_SEL_MASK GENMASK(26, USB30_CON_POW_SEL_SHIFT)
+#define USB30_CON_POW_SEL_IN_U3 BIT(26)
+#define USB30_CON_POW_SEL_IN_DISCON 0
+#define USB30_CON_POW_SEL_P2_TO_P0 BIT(25)
+#define USB30_CON_POW_SEL_P0_TO_P3 BIT(24)
+#define USB30_CON_POW_SEL_P0_TO_P2 0
+#define USB30_CON_B3_PLLWAKE BIT(23)
+#define USB30_CON_B3_CONNECT BIT(17)
+#define USB30_CON_B3_HOTRST_CMP BIT(1)
+
+/* USB_STA */
+#define USB_STA_SPEED_MASK (BIT(2) | BIT(1))
+#define USB_STA_SPEED_HS BIT(2)
+#define USB_STA_SPEED_FS BIT(1)
+#define USB_STA_SPEED_SS 0
+#define USB_STA_VBUS_STA BIT(0)
+
+/* DRD_CON */
+#define DRD_CON_PERI_RST BIT(31) /* rzv2m only */
+#define DRD_CON_HOST_RST BIT(30) /* rzv2m only */
+#define DRD_CON_PERI_CON BIT(24)
+#define DRD_CON_VBOUT BIT(0)
+
+/* USB_INT_ENA_1 and USB_INT_STA_1 */
+#define USB_INT_1_B3_PLLWKUP BIT(31)
+#define USB_INT_1_B3_LUPSUCS BIT(30)
+#define USB_INT_1_B3_DISABLE BIT(27)
+#define USB_INT_1_B3_WRMRST BIT(21)
+#define USB_INT_1_B3_HOTRST BIT(20)
+#define USB_INT_1_B2_USBRST BIT(12)
+#define USB_INT_1_B2_L1SPND BIT(11)
+#define USB_INT_1_B2_SPND BIT(9)
+#define USB_INT_1_B2_RSUM BIT(8)
+#define USB_INT_1_SPEED BIT(1)
+#define USB_INT_1_VBUS_CNG BIT(0)
+
+/* USB_INT_ENA_2 and USB_INT_STA_2 */
+#define USB_INT_2_PIPE(n) BIT(n)
+
+/* USB_OTG_STA, USB_OTG_INT_STA and USB_OTG_INT_ENA */
+#define USB_OTG_IDMON(p) ((p)->is_rzv2m ? BIT(0) : BIT(4))
+
+/* P0_MOD */
+#define P0_MOD_DIR BIT(6)
+
+/* P0_CON and PN_CON */
+#define PX_CON_BYTE_EN_MASK (BIT(10) | BIT(9))
+#define PX_CON_BYTE_EN_SHIFT 9
+#define PX_CON_BYTE_EN_BYTES(n) (((n) << PX_CON_BYTE_EN_SHIFT) & \
+ PX_CON_BYTE_EN_MASK)
+#define PX_CON_SEND BIT(8)
+
+/* P0_CON */
+#define P0_CON_ST_RES_MASK (BIT(27) | BIT(26))
+#define P0_CON_ST_RES_FORCE_STALL BIT(27)
+#define P0_CON_ST_RES_NORMAL BIT(26)
+#define P0_CON_ST_RES_FORCE_NRDY 0
+#define P0_CON_OT_RES_MASK (BIT(25) | BIT(24))
+#define P0_CON_OT_RES_FORCE_STALL BIT(25)
+#define P0_CON_OT_RES_NORMAL BIT(24)
+#define P0_CON_OT_RES_FORCE_NRDY 0
+#define P0_CON_IN_RES_MASK (BIT(17) | BIT(16))
+#define P0_CON_IN_RES_FORCE_STALL BIT(17)
+#define P0_CON_IN_RES_NORMAL BIT(16)
+#define P0_CON_IN_RES_FORCE_NRDY 0
+#define P0_CON_RES_WEN BIT(7)
+#define P0_CON_BCLR BIT(1)
+
+/* P0_STA and PN_STA */
+#define PX_STA_BUFSTS BIT(0)
+
+/* P0_INT_ENA and P0_INT_STA */
+#define P0_INT_STSED BIT(18)
+#define P0_INT_STSST BIT(17)
+#define P0_INT_SETUP BIT(16)
+#define P0_INT_RCVNL BIT(8)
+#define P0_INT_ERDY BIT(7)
+#define P0_INT_FLOW BIT(6)
+#define P0_INT_STALL BIT(2)
+#define P0_INT_NRDY BIT(1)
+#define P0_INT_BFRDY BIT(0)
+#define P0_INT_ALL_BITS (P0_INT_STSED | P0_INT_SETUP | P0_INT_BFRDY)
+
+/* PN_MOD */
+#define PN_MOD_DIR BIT(6)
+#define PN_MOD_TYPE_SHIFT 4
+#define PN_MOD_TYPE_MASK GENMASK(5, PN_MOD_TYPE_SHIFT)
+#define PN_MOD_TYPE(n) (((n) << PN_MOD_TYPE_SHIFT) & \
+ PN_MOD_TYPE_MASK)
+#define PN_MOD_EPNUM_MASK GENMASK(3, 0)
+#define PN_MOD_EPNUM(n) ((n) & PN_MOD_EPNUM_MASK)
+
+/* PN_RAMMAP */
+#define PN_RAMMAP_RAMAREA_SHIFT 29
+#define PN_RAMMAP_RAMAREA_MASK GENMASK(31, PN_RAMMAP_RAMAREA_SHIFT)
+#define PN_RAMMAP_RAMAREA_16KB BIT(31)
+#define PN_RAMMAP_RAMAREA_8KB (BIT(30) | BIT(29))
+#define PN_RAMMAP_RAMAREA_4KB BIT(30)
+#define PN_RAMMAP_RAMAREA_2KB BIT(29)
+#define PN_RAMMAP_RAMAREA_1KB 0
+#define PN_RAMMAP_MPKT_SHIFT 16
+#define PN_RAMMAP_MPKT_MASK GENMASK(26, PN_RAMMAP_MPKT_SHIFT)
+#define PN_RAMMAP_MPKT(n) (((n) << PN_RAMMAP_MPKT_SHIFT) & \
+ PN_RAMMAP_MPKT_MASK)
+#define PN_RAMMAP_RAMIF_SHIFT 14
+#define PN_RAMMAP_RAMIF_MASK GENMASK(15, PN_RAMMAP_RAMIF_SHIFT)
+#define PN_RAMMAP_RAMIF(n) (((n) << PN_RAMMAP_RAMIF_SHIFT) & \
+ PN_RAMMAP_RAMIF_MASK)
+#define PN_RAMMAP_BASEAD_MASK GENMASK(13, 0)
+#define PN_RAMMAP_BASEAD(offs) (((offs) >> 3) & PN_RAMMAP_BASEAD_MASK)
+#define PN_RAMMAP_DATA(area, ramif, basead) ((PN_RAMMAP_##area) | \
+ (PN_RAMMAP_RAMIF(ramif)) | \
+ (PN_RAMMAP_BASEAD(basead)))
+
+/* PN_CON */
+#define PN_CON_EN BIT(31)
+#define PN_CON_DATAIF_EN BIT(30)
+#define PN_CON_RES_MASK (BIT(17) | BIT(16))
+#define PN_CON_RES_FORCE_STALL BIT(17)
+#define PN_CON_RES_NORMAL BIT(16)
+#define PN_CON_RES_FORCE_NRDY 0
+#define PN_CON_LAST BIT(11)
+#define PN_CON_RES_WEN BIT(7)
+#define PN_CON_CLR BIT(0)
+
+/* PN_INT_STA and PN_INT_ENA */
+#define PN_INT_LSTTR BIT(4)
+#define PN_INT_BFRDY BIT(0)
+
+/* USB3_SSIFCMD */
+#define SSIFCMD_URES_U2 BIT(9)
+#define SSIFCMD_URES_U1 BIT(8)
+#define SSIFCMD_UDIR_U2 BIT(7)
+#define SSIFCMD_UDIR_U1 BIT(6)
+#define SSIFCMD_UREQ_U2 BIT(5)
+#define SSIFCMD_UREQ_U1 BIT(4)
+
+#define USB3_EP0_SS_MAX_PACKET_SIZE 512
+#define USB3_EP0_HSFS_MAX_PACKET_SIZE 64
+#define USB3_EP0_BUF_SIZE 8
+#define USB3_MAX_NUM_PIPES(p) ((p)->is_rzv2m ? 16 : 6) /* This includes PIPE 0 */
+#define USB3_WAIT_US 3
+#define USB3_DMA_NUM_SETTING_AREA 4
+/*
+ * To avoid double-meaning of "0" (xferred 65536 bytes or received zlp if
+ * buffer size is 65536), this driver uses the maximum size per a entry is
+ * 32768 bytes.
+ */
+#define USB3_DMA_MAX_XFER_SIZE 32768
+#define USB3_DMA_PRD_SIZE 4096
+
+struct renesas_usb3;
+
+/* Physical Region Descriptor Table */
+struct renesas_usb3_prd {
+ u32 word1;
+#define USB3_PRD1_E BIT(30) /* the end of chain */
+#define USB3_PRD1_U BIT(29) /* completion of transfer */
+#define USB3_PRD1_D BIT(28) /* Error occurred */
+#define USB3_PRD1_INT BIT(27) /* Interrupt occurred */
+#define USB3_PRD1_LST BIT(26) /* Last Packet */
+#define USB3_PRD1_B_INC BIT(24)
+#define USB3_PRD1_MPS_8 0
+#define USB3_PRD1_MPS_16 BIT(21)
+#define USB3_PRD1_MPS_32 BIT(22)
+#define USB3_PRD1_MPS_64 (BIT(22) | BIT(21))
+#define USB3_PRD1_MPS_512 BIT(23)
+#define USB3_PRD1_MPS_1024 (BIT(23) | BIT(21))
+#define USB3_PRD1_MPS_RESERVED (BIT(23) | BIT(22) | BIT(21))
+#define USB3_PRD1_SIZE_MASK GENMASK(15, 0)
+
+ u32 bap;
+};
+#define USB3_DMA_NUM_PRD_ENTRIES (USB3_DMA_PRD_SIZE / \
+ sizeof(struct renesas_usb3_prd))
+#define USB3_DMA_MAX_XFER_SIZE_ALL_PRDS (USB3_DMA_PRD_SIZE / \
+ sizeof(struct renesas_usb3_prd) * \
+ USB3_DMA_MAX_XFER_SIZE)
+
+struct renesas_usb3_dma {
+ struct renesas_usb3_prd *prd;
+ dma_addr_t prd_dma;
+ int num; /* Setting area number (from 1 to 4) */
+ bool used;
+};
+
+struct renesas_usb3_request {
+ struct usb_request req;
+ struct list_head queue;
+};
+
+#define USB3_EP_NAME_SIZE 8
+struct renesas_usb3_ep {
+ struct usb_ep ep;
+ struct renesas_usb3 *usb3;
+ struct renesas_usb3_dma *dma;
+ int num;
+ char ep_name[USB3_EP_NAME_SIZE];
+ struct list_head queue;
+ u32 rammap_val;
+ bool dir_in;
+ bool halt;
+ bool wedge;
+ bool started;
+};
+
+struct renesas_usb3_priv {
+ int ramsize_per_ramif; /* unit = bytes */
+ int num_ramif;
+ int ramsize_per_pipe; /* unit = bytes */
+ bool workaround_for_vbus; /* if true, don't check vbus signal */
+ bool is_rzv2m; /* if true, RZ/V2M SoC */
+};
+
+struct renesas_usb3 {
+ void __iomem *reg;
+ struct reset_control *drd_rstc;
+ struct reset_control *usbp_rstc;
+
+ struct usb_gadget gadget;
+ struct usb_gadget_driver *driver;
+ struct extcon_dev *extcon;
+ struct work_struct extcon_work;
+ struct phy *phy;
+ struct dentry *dentry;
+
+ struct usb_role_switch *role_sw;
+ struct device *host_dev;
+ struct work_struct role_work;
+ enum usb_role role;
+
+ struct renesas_usb3_ep *usb3_ep;
+ int num_usb3_eps;
+
+ struct renesas_usb3_dma dma[USB3_DMA_NUM_SETTING_AREA];
+
+ spinlock_t lock;
+ int disabled_count;
+
+ struct usb_request *ep0_req;
+
+ enum usb_role connection_state;
+ u16 test_mode;
+ u8 ep0_buf[USB3_EP0_BUF_SIZE];
+ bool softconnect;
+ bool workaround_for_vbus;
+ bool extcon_host; /* check id and set EXTCON_USB_HOST */
+ bool extcon_usb; /* check vbus and set EXTCON_USB */
+ bool forced_b_device;
+ bool start_to_connect;
+ bool role_sw_by_connector;
+ bool is_rzv2m;
+};
+
+#define gadget_to_renesas_usb3(_gadget) \
+ container_of(_gadget, struct renesas_usb3, gadget)
+#define renesas_usb3_to_gadget(renesas_usb3) (&renesas_usb3->gadget)
+#define usb3_to_dev(_usb3) (_usb3->gadget.dev.parent)
+
+#define usb_ep_to_usb3_ep(_ep) container_of(_ep, struct renesas_usb3_ep, ep)
+#define usb3_ep_to_usb3(_usb3_ep) (_usb3_ep->usb3)
+#define usb_req_to_usb3_req(_req) container_of(_req, \
+ struct renesas_usb3_request, req)
+
+#define usb3_get_ep(usb3, n) ((usb3)->usb3_ep + (n))
+#define usb3_for_each_ep(usb3_ep, usb3, i) \
+ for ((i) = 0, usb3_ep = usb3_get_ep(usb3, (i)); \
+ (i) < (usb3)->num_usb3_eps; \
+ (i)++, usb3_ep = usb3_get_ep(usb3, (i)))
+
+#define usb3_get_dma(usb3, i) (&(usb3)->dma[i])
+#define usb3_for_each_dma(usb3, dma, i) \
+ for ((i) = 0, dma = usb3_get_dma((usb3), (i)); \
+ (i) < USB3_DMA_NUM_SETTING_AREA; \
+ (i)++, dma = usb3_get_dma((usb3), (i)))
+
+static const char udc_name[] = "renesas_usb3";
+
+static bool use_dma = 1;
+module_param(use_dma, bool, 0644);
+MODULE_PARM_DESC(use_dma, "use dedicated DMAC");
+
+static void usb3_write(struct renesas_usb3 *usb3, u32 data, u32 offs)
+{
+ iowrite32(data, usb3->reg + offs);
+}
+
+static u32 usb3_read(struct renesas_usb3 *usb3, u32 offs)
+{
+ return ioread32(usb3->reg + offs);
+}
+
+static void usb3_set_bit(struct renesas_usb3 *usb3, u32 bits, u32 offs)
+{
+ u32 val = usb3_read(usb3, offs);
+
+ val |= bits;
+ usb3_write(usb3, val, offs);
+}
+
+static void usb3_clear_bit(struct renesas_usb3 *usb3, u32 bits, u32 offs)
+{
+ u32 val = usb3_read(usb3, offs);
+
+ val &= ~bits;
+ usb3_write(usb3, val, offs);
+}
+
+static int usb3_wait(struct renesas_usb3 *usb3, u32 reg, u32 mask,
+ u32 expected)
+{
+ int i;
+
+ for (i = 0; i < USB3_WAIT_US; i++) {
+ if ((usb3_read(usb3, reg) & mask) == expected)
+ return 0;
+ udelay(1);
+ }
+
+ dev_dbg(usb3_to_dev(usb3), "%s: timed out (%8x, %08x, %08x)\n",
+ __func__, reg, mask, expected);
+
+ return -EBUSY;
+}
+
+static void renesas_usb3_extcon_work(struct work_struct *work)
+{
+ struct renesas_usb3 *usb3 = container_of(work, struct renesas_usb3,
+ extcon_work);
+
+ extcon_set_state_sync(usb3->extcon, EXTCON_USB_HOST, usb3->extcon_host);
+ extcon_set_state_sync(usb3->extcon, EXTCON_USB, usb3->extcon_usb);
+}
+
+static void usb3_enable_irq_1(struct renesas_usb3 *usb3, u32 bits)
+{
+ usb3_set_bit(usb3, bits, USB3_USB_INT_ENA_1);
+}
+
+static void usb3_disable_irq_1(struct renesas_usb3 *usb3, u32 bits)
+{
+ usb3_clear_bit(usb3, bits, USB3_USB_INT_ENA_1);
+}
+
+static void usb3_enable_pipe_irq(struct renesas_usb3 *usb3, int num)
+{
+ usb3_set_bit(usb3, USB_INT_2_PIPE(num), USB3_USB_INT_ENA_2);
+}
+
+static void usb3_disable_pipe_irq(struct renesas_usb3 *usb3, int num)
+{
+ usb3_clear_bit(usb3, USB_INT_2_PIPE(num), USB3_USB_INT_ENA_2);
+}
+
+static bool usb3_is_host(struct renesas_usb3 *usb3)
+{
+ return !(usb3_read(usb3, USB3_DRD_CON(usb3)) & DRD_CON_PERI_CON);
+}
+
+static void usb3_init_axi_bridge(struct renesas_usb3 *usb3)
+{
+ /* Set AXI_INT */
+ usb3_write(usb3, ~0, USB3_DMA_INT_STA);
+ usb3_write(usb3, 0, USB3_DMA_INT_ENA);
+ usb3_set_bit(usb3, AXI_INT_DMAINT | AXI_INT_EPCINT, USB3_AXI_INT_ENA);
+}
+
+static void usb3_init_epc_registers(struct renesas_usb3 *usb3)
+{
+ usb3_write(usb3, ~0, USB3_USB_INT_STA_1);
+ if (!usb3->workaround_for_vbus)
+ usb3_enable_irq_1(usb3, USB_INT_1_VBUS_CNG);
+}
+
+static bool usb3_wakeup_usb2_phy(struct renesas_usb3 *usb3)
+{
+ if (!(usb3_read(usb3, USB3_USB20_CON) & USB20_CON_B2_SUSPEND))
+ return true; /* already waked it up */
+
+ usb3_clear_bit(usb3, USB20_CON_B2_SUSPEND, USB3_USB20_CON);
+ usb3_enable_irq_1(usb3, USB_INT_1_B2_RSUM);
+
+ return false;
+}
+
+static void usb3_usb2_pullup(struct renesas_usb3 *usb3, int pullup)
+{
+ u32 bits = USB20_CON_B2_PUE | USB20_CON_B2_CONNECT;
+
+ if (usb3->softconnect && pullup)
+ usb3_set_bit(usb3, bits, USB3_USB20_CON);
+ else
+ usb3_clear_bit(usb3, bits, USB3_USB20_CON);
+}
+
+static void usb3_set_test_mode(struct renesas_usb3 *usb3)
+{
+ u32 val = usb3_read(usb3, USB3_USB20_CON);
+
+ val &= ~USB20_CON_B2_TSTMOD_MASK;
+ val |= USB20_CON_B2_TSTMOD(usb3->test_mode);
+ usb3_write(usb3, val | USB20_CON_B2_TSTMOD_EN, USB3_USB20_CON);
+ if (!usb3->test_mode)
+ usb3_clear_bit(usb3, USB20_CON_B2_TSTMOD_EN, USB3_USB20_CON);
+}
+
+static void usb3_start_usb2_connection(struct renesas_usb3 *usb3)
+{
+ usb3->disabled_count++;
+ usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
+ usb3_set_bit(usb3, USB_COM_CON_SPD_MODE, USB3_USB_COM_CON);
+ usb3_usb2_pullup(usb3, 1);
+}
+
+static int usb3_is_usb3_phy_in_u3(struct renesas_usb3 *usb3)
+{
+ return usb3_read(usb3, USB3_USB30_CON) & USB30_CON_POW_SEL_IN_U3;
+}
+
+static bool usb3_wakeup_usb3_phy(struct renesas_usb3 *usb3)
+{
+ if (!usb3_is_usb3_phy_in_u3(usb3))
+ return true; /* already waked it up */
+
+ usb3_set_bit(usb3, USB30_CON_B3_PLLWAKE, USB3_USB30_CON);
+ usb3_enable_irq_1(usb3, USB_INT_1_B3_PLLWKUP);
+
+ return false;
+}
+
+static u16 usb3_feature_get_un_enabled(struct renesas_usb3 *usb3)
+{
+ u32 mask_u2 = SSIFCMD_UDIR_U2 | SSIFCMD_UREQ_U2;
+ u32 mask_u1 = SSIFCMD_UDIR_U1 | SSIFCMD_UREQ_U1;
+ u32 val = usb3_read(usb3, USB3_SSIFCMD);
+ u16 ret = 0;
+
+ /* Enables {U2,U1} if the bits of UDIR and UREQ are set to 0 */
+ if (!(val & mask_u2))
+ ret |= 1 << USB_DEV_STAT_U2_ENABLED;
+ if (!(val & mask_u1))
+ ret |= 1 << USB_DEV_STAT_U1_ENABLED;
+
+ return ret;
+}
+
+static void usb3_feature_u2_enable(struct renesas_usb3 *usb3, bool enable)
+{
+ u32 bits = SSIFCMD_UDIR_U2 | SSIFCMD_UREQ_U2;
+
+ /* Enables U2 if the bits of UDIR and UREQ are set to 0 */
+ if (enable)
+ usb3_clear_bit(usb3, bits, USB3_SSIFCMD);
+ else
+ usb3_set_bit(usb3, bits, USB3_SSIFCMD);
+}
+
+static void usb3_feature_u1_enable(struct renesas_usb3 *usb3, bool enable)
+{
+ u32 bits = SSIFCMD_UDIR_U1 | SSIFCMD_UREQ_U1;
+
+ /* Enables U1 if the bits of UDIR and UREQ are set to 0 */
+ if (enable)
+ usb3_clear_bit(usb3, bits, USB3_SSIFCMD);
+ else
+ usb3_set_bit(usb3, bits, USB3_SSIFCMD);
+}
+
+static void usb3_start_operation_for_usb3(struct renesas_usb3 *usb3)
+{
+ usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
+ usb3_clear_bit(usb3, USB_COM_CON_SPD_MODE, USB3_USB_COM_CON);
+ usb3_set_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON);
+}
+
+static void usb3_start_usb3_connection(struct renesas_usb3 *usb3)
+{
+ usb3_start_operation_for_usb3(usb3);
+ usb3_set_bit(usb3, USB_COM_CON_RX_DETECTION, USB3_USB_COM_CON);
+
+ usb3_enable_irq_1(usb3, USB_INT_1_B3_LUPSUCS | USB_INT_1_B3_DISABLE |
+ USB_INT_1_SPEED);
+}
+
+static void usb3_stop_usb3_connection(struct renesas_usb3 *usb3)
+{
+ usb3_clear_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON);
+}
+
+static void usb3_transition_to_default_state(struct renesas_usb3 *usb3,
+ bool is_usb3)
+{
+ usb3_set_bit(usb3, USB_INT_2_PIPE(0), USB3_USB_INT_ENA_2);
+ usb3_write(usb3, P0_INT_ALL_BITS, USB3_P0_INT_STA);
+ usb3_set_bit(usb3, P0_INT_ALL_BITS, USB3_P0_INT_ENA);
+
+ if (is_usb3)
+ usb3_enable_irq_1(usb3, USB_INT_1_B3_WRMRST |
+ USB_INT_1_B3_HOTRST);
+ else
+ usb3_enable_irq_1(usb3, USB_INT_1_B2_SPND |
+ USB_INT_1_B2_L1SPND | USB_INT_1_B2_USBRST);
+}
+
+static void usb3_connect(struct renesas_usb3 *usb3)
+{
+ if (usb3_wakeup_usb3_phy(usb3))
+ usb3_start_usb3_connection(usb3);
+}
+
+static void usb3_reset_epc(struct renesas_usb3 *usb3)
+{
+ usb3_clear_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON);
+ usb3_clear_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
+ usb3_set_bit(usb3, USB_COM_CON_PIPE_CLR, USB3_USB_COM_CON);
+ usb3->test_mode = 0;
+ usb3_set_test_mode(usb3);
+}
+
+static void usb3_disconnect(struct renesas_usb3 *usb3)
+{
+ usb3->disabled_count = 0;
+ usb3_usb2_pullup(usb3, 0);
+ usb3_clear_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON);
+ usb3_reset_epc(usb3);
+ usb3_disable_irq_1(usb3, USB_INT_1_B2_RSUM | USB_INT_1_B3_PLLWKUP |
+ USB_INT_1_B3_LUPSUCS | USB_INT_1_B3_DISABLE |
+ USB_INT_1_SPEED | USB_INT_1_B3_WRMRST |
+ USB_INT_1_B3_HOTRST | USB_INT_1_B2_SPND |
+ USB_INT_1_B2_L1SPND | USB_INT_1_B2_USBRST);
+ usb3_clear_bit(usb3, USB_COM_CON_SPD_MODE, USB3_USB_COM_CON);
+ usb3_init_epc_registers(usb3);
+
+ if (usb3->driver)
+ usb3->driver->disconnect(&usb3->gadget);
+}
+
+static void usb3_check_vbus(struct renesas_usb3 *usb3)
+{
+ if (usb3->workaround_for_vbus) {
+ usb3_connect(usb3);
+ } else {
+ usb3->extcon_usb = !!(usb3_read(usb3, USB3_USB_STA) &
+ USB_STA_VBUS_STA);
+ if (usb3->extcon_usb)
+ usb3_connect(usb3);
+ else
+ usb3_disconnect(usb3);
+
+ schedule_work(&usb3->extcon_work);
+ }
+}
+
+static void renesas_usb3_role_work(struct work_struct *work)
+{
+ struct renesas_usb3 *usb3 =
+ container_of(work, struct renesas_usb3, role_work);
+
+ usb_role_switch_set_role(usb3->role_sw, usb3->role);
+}
+
+static void usb3_set_mode(struct renesas_usb3 *usb3, bool host)
+{
+ if (usb3->is_rzv2m) {
+ if (host) {
+ usb3_set_bit(usb3, DRD_CON_PERI_RST, USB3_DRD_CON(usb3));
+ usb3_clear_bit(usb3, DRD_CON_HOST_RST, USB3_DRD_CON(usb3));
+ } else {
+ usb3_set_bit(usb3, DRD_CON_HOST_RST, USB3_DRD_CON(usb3));
+ usb3_clear_bit(usb3, DRD_CON_PERI_RST, USB3_DRD_CON(usb3));
+ }
+ }
+
+ if (host)
+ usb3_clear_bit(usb3, DRD_CON_PERI_CON, USB3_DRD_CON(usb3));
+ else
+ usb3_set_bit(usb3, DRD_CON_PERI_CON, USB3_DRD_CON(usb3));
+}
+
+static void usb3_set_mode_by_role_sw(struct renesas_usb3 *usb3, bool host)
+{
+ if (usb3->role_sw) {
+ usb3->role = host ? USB_ROLE_HOST : USB_ROLE_DEVICE;
+ schedule_work(&usb3->role_work);
+ } else {
+ usb3_set_mode(usb3, host);
+ }
+}
+
+static void usb3_vbus_out(struct renesas_usb3 *usb3, bool enable)
+{
+ if (enable)
+ usb3_set_bit(usb3, DRD_CON_VBOUT, USB3_DRD_CON(usb3));
+ else
+ usb3_clear_bit(usb3, DRD_CON_VBOUT, USB3_DRD_CON(usb3));
+}
+
+static void usb3_mode_config(struct renesas_usb3 *usb3, bool host, bool a_dev)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&usb3->lock, flags);
+ if (!usb3->role_sw_by_connector ||
+ usb3->connection_state != USB_ROLE_NONE) {
+ usb3_set_mode_by_role_sw(usb3, host);
+ usb3_vbus_out(usb3, a_dev);
+ }
+ /* for A-Peripheral or forced B-device mode */
+ if ((!host && a_dev) || usb3->start_to_connect)
+ usb3_connect(usb3);
+ spin_unlock_irqrestore(&usb3->lock, flags);
+}
+
+static bool usb3_is_a_device(struct renesas_usb3 *usb3)
+{
+ return !(usb3_read(usb3, USB3_USB_OTG_STA(usb3)) & USB_OTG_IDMON(usb3));
+}
+
+static void usb3_check_id(struct renesas_usb3 *usb3)
+{
+ usb3->extcon_host = usb3_is_a_device(usb3);
+
+ if ((!usb3->role_sw_by_connector && usb3->extcon_host &&
+ !usb3->forced_b_device) || usb3->connection_state == USB_ROLE_HOST)
+ usb3_mode_config(usb3, true, true);
+ else
+ usb3_mode_config(usb3, false, false);
+
+ schedule_work(&usb3->extcon_work);
+}
+
+static void renesas_usb3_init_controller(struct renesas_usb3 *usb3)
+{
+ usb3_init_axi_bridge(usb3);
+ usb3_init_epc_registers(usb3);
+ usb3_set_bit(usb3, USB_COM_CON_PN_WDATAIF_NL |
+ USB_COM_CON_PN_RDATAIF_NL | USB_COM_CON_PN_LSTTR_PP,
+ USB3_USB_COM_CON);
+ usb3_write(usb3, USB_OTG_IDMON(usb3), USB3_USB_OTG_INT_STA(usb3));
+ usb3_write(usb3, USB_OTG_IDMON(usb3), USB3_USB_OTG_INT_ENA(usb3));
+
+ usb3_check_id(usb3);
+ usb3_check_vbus(usb3);
+}
+
+static void renesas_usb3_stop_controller(struct renesas_usb3 *usb3)
+{
+ usb3_disconnect(usb3);
+ usb3_write(usb3, 0, USB3_P0_INT_ENA);
+ usb3_write(usb3, 0, USB3_USB_OTG_INT_ENA(usb3));
+ usb3_write(usb3, 0, USB3_USB_INT_ENA_1);
+ usb3_write(usb3, 0, USB3_USB_INT_ENA_2);
+ usb3_write(usb3, 0, USB3_AXI_INT_ENA);
+}
+
+static void usb3_irq_epc_int_1_pll_wakeup(struct renesas_usb3 *usb3)
+{
+ usb3_disable_irq_1(usb3, USB_INT_1_B3_PLLWKUP);
+ usb3_clear_bit(usb3, USB30_CON_B3_PLLWAKE, USB3_USB30_CON);
+ usb3_start_usb3_connection(usb3);
+}
+
+static void usb3_irq_epc_int_1_linkup_success(struct renesas_usb3 *usb3)
+{
+ usb3_transition_to_default_state(usb3, true);
+}
+
+static void usb3_irq_epc_int_1_resume(struct renesas_usb3 *usb3)
+{
+ usb3_disable_irq_1(usb3, USB_INT_1_B2_RSUM);
+ usb3_start_usb2_connection(usb3);
+ usb3_transition_to_default_state(usb3, false);
+}
+
+static void usb3_irq_epc_int_1_suspend(struct renesas_usb3 *usb3)
+{
+ usb3_disable_irq_1(usb3, USB_INT_1_B2_SPND);
+
+ if (usb3->gadget.speed != USB_SPEED_UNKNOWN &&
+ usb3->gadget.state != USB_STATE_NOTATTACHED) {
+ if (usb3->driver && usb3->driver->suspend)
+ usb3->driver->suspend(&usb3->gadget);
+ usb_gadget_set_state(&usb3->gadget, USB_STATE_SUSPENDED);
+ }
+}
+
+static void usb3_irq_epc_int_1_disable(struct renesas_usb3 *usb3)
+{
+ usb3_stop_usb3_connection(usb3);
+ if (usb3_wakeup_usb2_phy(usb3))
+ usb3_irq_epc_int_1_resume(usb3);
+}
+
+static void usb3_irq_epc_int_1_bus_reset(struct renesas_usb3 *usb3)
+{
+ usb3_reset_epc(usb3);
+ if (usb3->disabled_count < 3)
+ usb3_start_usb3_connection(usb3);
+ else
+ usb3_start_usb2_connection(usb3);
+}
+
+static void usb3_irq_epc_int_1_vbus_change(struct renesas_usb3 *usb3)
+{
+ usb3_check_vbus(usb3);
+}
+
+static void usb3_irq_epc_int_1_hot_reset(struct renesas_usb3 *usb3)
+{
+ usb3_reset_epc(usb3);
+ usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
+
+ /* This bit shall be set within 12ms from the start of HotReset */
+ usb3_set_bit(usb3, USB30_CON_B3_HOTRST_CMP, USB3_USB30_CON);
+}
+
+static void usb3_irq_epc_int_1_warm_reset(struct renesas_usb3 *usb3)
+{
+ usb3_reset_epc(usb3);
+ usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
+
+ usb3_start_operation_for_usb3(usb3);
+ usb3_enable_irq_1(usb3, USB_INT_1_SPEED);
+}
+
+static void usb3_irq_epc_int_1_speed(struct renesas_usb3 *usb3)
+{
+ u32 speed = usb3_read(usb3, USB3_USB_STA) & USB_STA_SPEED_MASK;
+
+ switch (speed) {
+ case USB_STA_SPEED_SS:
+ usb3->gadget.speed = USB_SPEED_SUPER;
+ usb3->gadget.ep0->maxpacket = USB3_EP0_SS_MAX_PACKET_SIZE;
+ break;
+ case USB_STA_SPEED_HS:
+ usb3->gadget.speed = USB_SPEED_HIGH;
+ usb3->gadget.ep0->maxpacket = USB3_EP0_HSFS_MAX_PACKET_SIZE;
+ break;
+ case USB_STA_SPEED_FS:
+ usb3->gadget.speed = USB_SPEED_FULL;
+ usb3->gadget.ep0->maxpacket = USB3_EP0_HSFS_MAX_PACKET_SIZE;
+ break;
+ default:
+ usb3->gadget.speed = USB_SPEED_UNKNOWN;
+ break;
+ }
+}
+
+static void usb3_irq_epc_int_1(struct renesas_usb3 *usb3, u32 int_sta_1)
+{
+ if (int_sta_1 & USB_INT_1_B3_PLLWKUP)
+ usb3_irq_epc_int_1_pll_wakeup(usb3);
+
+ if (int_sta_1 & USB_INT_1_B3_LUPSUCS)
+ usb3_irq_epc_int_1_linkup_success(usb3);
+
+ if (int_sta_1 & USB_INT_1_B3_HOTRST)
+ usb3_irq_epc_int_1_hot_reset(usb3);
+
+ if (int_sta_1 & USB_INT_1_B3_WRMRST)
+ usb3_irq_epc_int_1_warm_reset(usb3);
+
+ if (int_sta_1 & USB_INT_1_B3_DISABLE)
+ usb3_irq_epc_int_1_disable(usb3);
+
+ if (int_sta_1 & USB_INT_1_B2_USBRST)
+ usb3_irq_epc_int_1_bus_reset(usb3);
+
+ if (int_sta_1 & USB_INT_1_B2_RSUM)
+ usb3_irq_epc_int_1_resume(usb3);
+
+ if (int_sta_1 & USB_INT_1_B2_SPND)
+ usb3_irq_epc_int_1_suspend(usb3);
+
+ if (int_sta_1 & USB_INT_1_SPEED)
+ usb3_irq_epc_int_1_speed(usb3);
+
+ if (int_sta_1 & USB_INT_1_VBUS_CNG)
+ usb3_irq_epc_int_1_vbus_change(usb3);
+}
+
+static struct renesas_usb3_request *__usb3_get_request(struct renesas_usb3_ep
+ *usb3_ep)
+{
+ return list_first_entry_or_null(&usb3_ep->queue,
+ struct renesas_usb3_request, queue);
+}
+
+static struct renesas_usb3_request *usb3_get_request(struct renesas_usb3_ep
+ *usb3_ep)
+{
+ struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+ struct renesas_usb3_request *usb3_req;
+ unsigned long flags;
+
+ spin_lock_irqsave(&usb3->lock, flags);
+ usb3_req = __usb3_get_request(usb3_ep);
+ spin_unlock_irqrestore(&usb3->lock, flags);
+
+ return usb3_req;
+}
+
+static void __usb3_request_done(struct renesas_usb3_ep *usb3_ep,
+ struct renesas_usb3_request *usb3_req,
+ int status)
+{
+ struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+
+ dev_dbg(usb3_to_dev(usb3), "giveback: ep%2d, %u, %u, %d\n",
+ usb3_ep->num, usb3_req->req.length, usb3_req->req.actual,
+ status);
+ usb3_req->req.status = status;
+ usb3_ep->started = false;
+ list_del_init(&usb3_req->queue);
+ spin_unlock(&usb3->lock);
+ usb_gadget_giveback_request(&usb3_ep->ep, &usb3_req->req);
+ spin_lock(&usb3->lock);
+}
+
+static void usb3_request_done(struct renesas_usb3_ep *usb3_ep,
+ struct renesas_usb3_request *usb3_req, int status)
+{
+ struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+ unsigned long flags;
+
+ spin_lock_irqsave(&usb3->lock, flags);
+ __usb3_request_done(usb3_ep, usb3_req, status);
+ spin_unlock_irqrestore(&usb3->lock, flags);
+}
+
+static void usb3_irq_epc_pipe0_status_end(struct renesas_usb3 *usb3)
+{
+ struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
+ struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
+
+ if (usb3_req)
+ usb3_request_done(usb3_ep, usb3_req, 0);
+ if (usb3->test_mode)
+ usb3_set_test_mode(usb3);
+}
+
+static void usb3_get_setup_data(struct renesas_usb3 *usb3,
+ struct usb_ctrlrequest *ctrl)
+{
+ struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
+ u32 *data = (u32 *)ctrl;
+
+ *data++ = usb3_read(usb3, USB3_STUP_DAT_0);
+ *data = usb3_read(usb3, USB3_STUP_DAT_1);
+
+ /* update this driver's flag */
+ usb3_ep->dir_in = !!(ctrl->bRequestType & USB_DIR_IN);
+}
+
+static void usb3_set_p0_con_update_res(struct renesas_usb3 *usb3, u32 res)
+{
+ u32 val = usb3_read(usb3, USB3_P0_CON);
+
+ val &= ~(P0_CON_ST_RES_MASK | P0_CON_OT_RES_MASK | P0_CON_IN_RES_MASK);
+ val |= res | P0_CON_RES_WEN;
+ usb3_write(usb3, val, USB3_P0_CON);
+}
+
+static void usb3_set_p0_con_for_ctrl_read_data(struct renesas_usb3 *usb3)
+{
+ usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY |
+ P0_CON_OT_RES_FORCE_STALL |
+ P0_CON_IN_RES_NORMAL);
+}
+
+static void usb3_set_p0_con_for_ctrl_read_status(struct renesas_usb3 *usb3)
+{
+ usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL |
+ P0_CON_OT_RES_FORCE_STALL |
+ P0_CON_IN_RES_NORMAL);
+}
+
+static void usb3_set_p0_con_for_ctrl_write_data(struct renesas_usb3 *usb3)
+{
+ usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY |
+ P0_CON_OT_RES_NORMAL |
+ P0_CON_IN_RES_FORCE_STALL);
+}
+
+static void usb3_set_p0_con_for_ctrl_write_status(struct renesas_usb3 *usb3)
+{
+ usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL |
+ P0_CON_OT_RES_NORMAL |
+ P0_CON_IN_RES_FORCE_STALL);
+}
+
+static void usb3_set_p0_con_for_no_data(struct renesas_usb3 *usb3)
+{
+ usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL |
+ P0_CON_OT_RES_FORCE_STALL |
+ P0_CON_IN_RES_FORCE_STALL);
+}
+
+static void usb3_set_p0_con_stall(struct renesas_usb3 *usb3)
+{
+ usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_STALL |
+ P0_CON_OT_RES_FORCE_STALL |
+ P0_CON_IN_RES_FORCE_STALL);
+}
+
+static void usb3_set_p0_con_stop(struct renesas_usb3 *usb3)
+{
+ usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY |
+ P0_CON_OT_RES_FORCE_NRDY |
+ P0_CON_IN_RES_FORCE_NRDY);
+}
+
+static int usb3_pn_change(struct renesas_usb3 *usb3, int num)
+{
+ if (num == 0 || num > usb3->num_usb3_eps)
+ return -ENXIO;
+
+ usb3_write(usb3, num, USB3_PIPE_COM);
+
+ return 0;
+}
+
+static void usb3_set_pn_con_update_res(struct renesas_usb3 *usb3, u32 res)
+{
+ u32 val = usb3_read(usb3, USB3_PN_CON);
+
+ val &= ~PN_CON_RES_MASK;
+ val |= res & PN_CON_RES_MASK;
+ val |= PN_CON_RES_WEN;
+ usb3_write(usb3, val, USB3_PN_CON);
+}
+
+static void usb3_pn_start(struct renesas_usb3 *usb3)
+{
+ usb3_set_pn_con_update_res(usb3, PN_CON_RES_NORMAL);
+}
+
+static void usb3_pn_stop(struct renesas_usb3 *usb3)
+{
+ usb3_set_pn_con_update_res(usb3, PN_CON_RES_FORCE_NRDY);
+}
+
+static void usb3_pn_stall(struct renesas_usb3 *usb3)
+{
+ usb3_set_pn_con_update_res(usb3, PN_CON_RES_FORCE_STALL);
+}
+
+static int usb3_pn_con_clear(struct renesas_usb3 *usb3)
+{
+ usb3_set_bit(usb3, PN_CON_CLR, USB3_PN_CON);
+
+ return usb3_wait(usb3, USB3_PN_CON, PN_CON_CLR, 0);
+}
+
+static bool usb3_is_transfer_complete(struct renesas_usb3_ep *usb3_ep,
+ struct renesas_usb3_request *usb3_req)
+{
+ struct usb_request *req = &usb3_req->req;
+
+ if ((!req->zero && req->actual == req->length) ||
+ (req->actual % usb3_ep->ep.maxpacket) || (req->length == 0))
+ return true;
+ else
+ return false;
+}
+
+static int usb3_wait_pipe_status(struct renesas_usb3_ep *usb3_ep, u32 mask)
+{
+ struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+ u32 sta_reg = usb3_ep->num ? USB3_PN_STA : USB3_P0_STA;
+
+ return usb3_wait(usb3, sta_reg, mask, mask);
+}
+
+static void usb3_set_px_con_send(struct renesas_usb3_ep *usb3_ep, int bytes,
+ bool last)
+{
+ struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+ u32 con_reg = usb3_ep->num ? USB3_PN_CON : USB3_P0_CON;
+ u32 val = usb3_read(usb3, con_reg);
+
+ val |= PX_CON_SEND | PX_CON_BYTE_EN_BYTES(bytes);
+ val |= (usb3_ep->num && last) ? PN_CON_LAST : 0;
+ usb3_write(usb3, val, con_reg);
+}
+
+static int usb3_write_pipe(struct renesas_usb3_ep *usb3_ep,
+ struct renesas_usb3_request *usb3_req,
+ u32 fifo_reg)
+{
+ struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+ int i;
+ int len = min_t(unsigned, usb3_req->req.length - usb3_req->req.actual,
+ usb3_ep->ep.maxpacket);
+ u8 *buf = usb3_req->req.buf + usb3_req->req.actual;
+ u32 tmp = 0;
+ bool is_last = !len ? true : false;
+
+ if (usb3_wait_pipe_status(usb3_ep, PX_STA_BUFSTS) < 0)
+ return -EBUSY;
+
+ /* Update gadget driver parameter */
+ usb3_req->req.actual += len;
+
+ /* Write data to the register */
+ if (len >= 4) {
+ iowrite32_rep(usb3->reg + fifo_reg, buf, len / 4);
+ buf += (len / 4) * 4;
+ len %= 4; /* update len to use usb3_set_pX_con_send() */
+ }
+
+ if (len) {
+ for (i = 0; i < len; i++)
+ tmp |= buf[i] << (8 * i);
+ usb3_write(usb3, tmp, fifo_reg);
+ }
+
+ if (!is_last)
+ is_last = usb3_is_transfer_complete(usb3_ep, usb3_req);
+ /* Send the data */
+ usb3_set_px_con_send(usb3_ep, len, is_last);
+
+ return is_last ? 0 : -EAGAIN;
+}
+
+static u32 usb3_get_received_length(struct renesas_usb3_ep *usb3_ep)
+{
+ struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+ u32 lng_reg = usb3_ep->num ? USB3_PN_LNG : USB3_P0_LNG;
+
+ return usb3_read(usb3, lng_reg);
+}
+
+static int usb3_read_pipe(struct renesas_usb3_ep *usb3_ep,
+ struct renesas_usb3_request *usb3_req, u32 fifo_reg)
+{
+ struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+ int i;
+ int len = min_t(unsigned, usb3_req->req.length - usb3_req->req.actual,
+ usb3_get_received_length(usb3_ep));
+ u8 *buf = usb3_req->req.buf + usb3_req->req.actual;
+ u32 tmp = 0;
+
+ if (!len)
+ return 0;
+
+ /* Update gadget driver parameter */
+ usb3_req->req.actual += len;
+
+ /* Read data from the register */
+ if (len >= 4) {
+ ioread32_rep(usb3->reg + fifo_reg, buf, len / 4);
+ buf += (len / 4) * 4;
+ len %= 4;
+ }
+
+ if (len) {
+ tmp = usb3_read(usb3, fifo_reg);
+ for (i = 0; i < len; i++)
+ buf[i] = (tmp >> (8 * i)) & 0xff;
+ }
+
+ return usb3_is_transfer_complete(usb3_ep, usb3_req) ? 0 : -EAGAIN;
+}
+
+static void usb3_set_status_stage(struct renesas_usb3_ep *usb3_ep,
+ struct renesas_usb3_request *usb3_req)
+{
+ struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+
+ if (usb3_ep->dir_in) {
+ usb3_set_p0_con_for_ctrl_read_status(usb3);
+ } else {
+ if (!usb3_req->req.length)
+ usb3_set_p0_con_for_no_data(usb3);
+ else
+ usb3_set_p0_con_for_ctrl_write_status(usb3);
+ }
+}
+
+static void usb3_p0_xfer(struct renesas_usb3_ep *usb3_ep,
+ struct renesas_usb3_request *usb3_req)
+{
+ int ret;
+
+ if (usb3_ep->dir_in)
+ ret = usb3_write_pipe(usb3_ep, usb3_req, USB3_P0_WRITE);
+ else
+ ret = usb3_read_pipe(usb3_ep, usb3_req, USB3_P0_READ);
+
+ if (!ret)
+ usb3_set_status_stage(usb3_ep, usb3_req);
+}
+
+static void usb3_start_pipe0(struct renesas_usb3_ep *usb3_ep,
+ struct renesas_usb3_request *usb3_req)
+{
+ struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+
+ if (usb3_ep->started)
+ return;
+
+ usb3_ep->started = true;
+
+ if (usb3_ep->dir_in) {
+ usb3_set_bit(usb3, P0_MOD_DIR, USB3_P0_MOD);
+ usb3_set_p0_con_for_ctrl_read_data(usb3);
+ } else {
+ usb3_clear_bit(usb3, P0_MOD_DIR, USB3_P0_MOD);
+ if (usb3_req->req.length)
+ usb3_set_p0_con_for_ctrl_write_data(usb3);
+ }
+
+ usb3_p0_xfer(usb3_ep, usb3_req);
+}
+
+static void usb3_enable_dma_pipen(struct renesas_usb3 *usb3)
+{
+ usb3_set_bit(usb3, PN_CON_DATAIF_EN, USB3_PN_CON);
+}
+
+static void usb3_disable_dma_pipen(struct renesas_usb3 *usb3)
+{
+ usb3_clear_bit(usb3, PN_CON_DATAIF_EN, USB3_PN_CON);
+}
+
+static void usb3_enable_dma_irq(struct renesas_usb3 *usb3, int num)
+{
+ usb3_set_bit(usb3, DMA_INT(num), USB3_DMA_INT_ENA);
+}
+
+static void usb3_disable_dma_irq(struct renesas_usb3 *usb3, int num)
+{
+ usb3_clear_bit(usb3, DMA_INT(num), USB3_DMA_INT_ENA);
+}
+
+static u32 usb3_dma_mps_to_prd_word1(struct renesas_usb3_ep *usb3_ep)
+{
+ switch (usb3_ep->ep.maxpacket) {
+ case 8:
+ return USB3_PRD1_MPS_8;
+ case 16:
+ return USB3_PRD1_MPS_16;
+ case 32:
+ return USB3_PRD1_MPS_32;
+ case 64:
+ return USB3_PRD1_MPS_64;
+ case 512:
+ return USB3_PRD1_MPS_512;
+ case 1024:
+ return USB3_PRD1_MPS_1024;
+ default:
+ return USB3_PRD1_MPS_RESERVED;
+ }
+}
+
+static bool usb3_dma_get_setting_area(struct renesas_usb3_ep *usb3_ep,
+ struct renesas_usb3_request *usb3_req)
+{
+ struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+ struct renesas_usb3_dma *dma;
+ int i;
+ bool ret = false;
+
+ if (usb3_req->req.length > USB3_DMA_MAX_XFER_SIZE_ALL_PRDS) {
+ dev_dbg(usb3_to_dev(usb3), "%s: the length is too big (%d)\n",
+ __func__, usb3_req->req.length);
+ return false;
+ }
+
+ /* The driver doesn't handle zero-length packet via dmac */
+ if (!usb3_req->req.length)
+ return false;
+
+ if (usb3_dma_mps_to_prd_word1(usb3_ep) == USB3_PRD1_MPS_RESERVED)
+ return false;
+
+ usb3_for_each_dma(usb3, dma, i) {
+ if (dma->used)
+ continue;
+
+ if (usb_gadget_map_request(&usb3->gadget, &usb3_req->req,
+ usb3_ep->dir_in) < 0)
+ break;
+
+ dma->used = true;
+ usb3_ep->dma = dma;
+ ret = true;
+ break;
+ }
+
+ return ret;
+}
+
+static void usb3_dma_put_setting_area(struct renesas_usb3_ep *usb3_ep,
+ struct renesas_usb3_request *usb3_req)
+{
+ struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+ int i;
+ struct renesas_usb3_dma *dma;
+
+ usb3_for_each_dma(usb3, dma, i) {
+ if (usb3_ep->dma == dma) {
+ usb_gadget_unmap_request(&usb3->gadget, &usb3_req->req,
+ usb3_ep->dir_in);
+ dma->used = false;
+ usb3_ep->dma = NULL;
+ break;
+ }
+ }
+}
+
+static void usb3_dma_fill_prd(struct renesas_usb3_ep *usb3_ep,
+ struct renesas_usb3_request *usb3_req)
+{
+ struct renesas_usb3_prd *cur_prd = usb3_ep->dma->prd;
+ u32 remain = usb3_req->req.length;
+ u32 dma = usb3_req->req.dma;
+ u32 len;
+ int i = 0;
+
+ do {
+ len = min_t(u32, remain, USB3_DMA_MAX_XFER_SIZE) &
+ USB3_PRD1_SIZE_MASK;
+ cur_prd->word1 = usb3_dma_mps_to_prd_word1(usb3_ep) |
+ USB3_PRD1_B_INC | len;
+ cur_prd->bap = dma;
+ remain -= len;
+ dma += len;
+ if (!remain || (i + 1) < USB3_DMA_NUM_PRD_ENTRIES)
+ break;
+
+ cur_prd++;
+ i++;
+ } while (1);
+
+ cur_prd->word1 |= USB3_PRD1_E | USB3_PRD1_INT;
+ if (usb3_ep->dir_in)
+ cur_prd->word1 |= USB3_PRD1_LST;
+}
+
+static void usb3_dma_kick_prd(struct renesas_usb3_ep *usb3_ep)
+{
+ struct renesas_usb3_dma *dma = usb3_ep->dma;
+ struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+ u32 dma_con = DMA_COM_PIPE_NO(usb3_ep->num) | DMA_CON_PRD_EN;
+
+ if (usb3_ep->dir_in)
+ dma_con |= DMA_CON_PIPE_DIR;
+
+ wmb(); /* prd entries should be in system memory here */
+
+ usb3_write(usb3, 1 << usb3_ep->num, USB3_DMA_INT_STA);
+ usb3_write(usb3, AXI_INT_PRDEN_CLR_STA(dma->num) |
+ AXI_INT_PRDERR_STA(dma->num), USB3_AXI_INT_STA);
+
+ usb3_write(usb3, dma->prd_dma, USB3_DMA_CH0_PRD_ADR(dma->num));
+ usb3_write(usb3, dma_con, USB3_DMA_CH0_CON(dma->num));
+ usb3_enable_dma_irq(usb3, usb3_ep->num);
+}
+
+static void usb3_dma_stop_prd(struct renesas_usb3_ep *usb3_ep)
+{
+ struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+ struct renesas_usb3_dma *dma = usb3_ep->dma;
+
+ usb3_disable_dma_irq(usb3, usb3_ep->num);
+ usb3_write(usb3, 0, USB3_DMA_CH0_CON(dma->num));
+}
+
+static int usb3_dma_update_status(struct renesas_usb3_ep *usb3_ep,
+ struct renesas_usb3_request *usb3_req)
+{
+ struct renesas_usb3_prd *cur_prd = usb3_ep->dma->prd;
+ struct usb_request *req = &usb3_req->req;
+ u32 remain, len;
+ int i = 0;
+ int status = 0;
+
+ rmb(); /* The controller updated prd entries */
+
+ do {
+ if (cur_prd->word1 & USB3_PRD1_D)
+ status = -EIO;
+ if (cur_prd->word1 & USB3_PRD1_E)
+ len = req->length % USB3_DMA_MAX_XFER_SIZE;
+ else
+ len = USB3_DMA_MAX_XFER_SIZE;
+ remain = cur_prd->word1 & USB3_PRD1_SIZE_MASK;
+ req->actual += len - remain;
+
+ if (cur_prd->word1 & USB3_PRD1_E ||
+ (i + 1) < USB3_DMA_NUM_PRD_ENTRIES)
+ break;
+
+ cur_prd++;
+ i++;
+ } while (1);
+
+ return status;
+}
+
+static bool usb3_dma_try_start(struct renesas_usb3_ep *usb3_ep,
+ struct renesas_usb3_request *usb3_req)
+{
+ struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+
+ if (!use_dma)
+ return false;
+
+ if (usb3_dma_get_setting_area(usb3_ep, usb3_req)) {
+ usb3_pn_stop(usb3);
+ usb3_enable_dma_pipen(usb3);
+ usb3_dma_fill_prd(usb3_ep, usb3_req);
+ usb3_dma_kick_prd(usb3_ep);
+ usb3_pn_start(usb3);
+ return true;
+ }
+
+ return false;
+}
+
+static int usb3_dma_try_stop(struct renesas_usb3_ep *usb3_ep,
+ struct renesas_usb3_request *usb3_req)
+{
+ struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+ unsigned long flags;
+ int status = 0;
+
+ spin_lock_irqsave(&usb3->lock, flags);
+ if (!usb3_ep->dma)
+ goto out;
+
+ if (!usb3_pn_change(usb3, usb3_ep->num))
+ usb3_disable_dma_pipen(usb3);
+ usb3_dma_stop_prd(usb3_ep);
+ status = usb3_dma_update_status(usb3_ep, usb3_req);
+ usb3_dma_put_setting_area(usb3_ep, usb3_req);
+
+out:
+ spin_unlock_irqrestore(&usb3->lock, flags);
+ return status;
+}
+
+static int renesas_usb3_dma_free_prd(struct renesas_usb3 *usb3,
+ struct device *dev)
+{
+ int i;
+ struct renesas_usb3_dma *dma;
+
+ usb3_for_each_dma(usb3, dma, i) {
+ if (dma->prd) {
+ dma_free_coherent(dev, USB3_DMA_PRD_SIZE,
+ dma->prd, dma->prd_dma);
+ dma->prd = NULL;
+ }
+ }
+
+ return 0;
+}
+
+static int renesas_usb3_dma_alloc_prd(struct renesas_usb3 *usb3,
+ struct device *dev)
+{
+ int i;
+ struct renesas_usb3_dma *dma;
+
+ if (!use_dma)
+ return 0;
+
+ usb3_for_each_dma(usb3, dma, i) {
+ dma->prd = dma_alloc_coherent(dev, USB3_DMA_PRD_SIZE,
+ &dma->prd_dma, GFP_KERNEL);
+ if (!dma->prd) {
+ renesas_usb3_dma_free_prd(usb3, dev);
+ return -ENOMEM;
+ }
+ dma->num = i + 1;
+ }
+
+ return 0;
+}
+
+static void usb3_start_pipen(struct renesas_usb3_ep *usb3_ep,
+ struct renesas_usb3_request *usb3_req)
+{
+ struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+ struct renesas_usb3_request *usb3_req_first;
+ unsigned long flags;
+ int ret = -EAGAIN;
+ u32 enable_bits = 0;
+
+ spin_lock_irqsave(&usb3->lock, flags);
+ if (usb3_ep->halt || usb3_ep->started)
+ goto out;
+ usb3_req_first = __usb3_get_request(usb3_ep);
+ if (!usb3_req_first || usb3_req != usb3_req_first)
+ goto out;
+
+ if (usb3_pn_change(usb3, usb3_ep->num) < 0)
+ goto out;
+
+ usb3_ep->started = true;
+
+ if (usb3_dma_try_start(usb3_ep, usb3_req))
+ goto out;
+
+ usb3_pn_start(usb3);
+
+ if (usb3_ep->dir_in) {
+ ret = usb3_write_pipe(usb3_ep, usb3_req, USB3_PN_WRITE);
+ enable_bits |= PN_INT_LSTTR;
+ }
+
+ if (ret < 0)
+ enable_bits |= PN_INT_BFRDY;
+
+ if (enable_bits) {
+ usb3_set_bit(usb3, enable_bits, USB3_PN_INT_ENA);
+ usb3_enable_pipe_irq(usb3, usb3_ep->num);
+ }
+out:
+ spin_unlock_irqrestore(&usb3->lock, flags);
+}
+
+static int renesas_usb3_ep_queue(struct usb_ep *_ep, struct usb_request *_req,
+ gfp_t gfp_flags)
+{
+ struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
+ struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req);
+ struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+ unsigned long flags;
+
+ dev_dbg(usb3_to_dev(usb3), "ep_queue: ep%2d, %u\n", usb3_ep->num,
+ _req->length);
+
+ _req->status = -EINPROGRESS;
+ _req->actual = 0;
+ spin_lock_irqsave(&usb3->lock, flags);
+ list_add_tail(&usb3_req->queue, &usb3_ep->queue);
+ spin_unlock_irqrestore(&usb3->lock, flags);
+
+ if (!usb3_ep->num)
+ usb3_start_pipe0(usb3_ep, usb3_req);
+ else
+ usb3_start_pipen(usb3_ep, usb3_req);
+
+ return 0;
+}
+
+static void usb3_set_device_address(struct renesas_usb3 *usb3, u16 addr)
+{
+ /* DEV_ADDR bit field is cleared by WarmReset, HotReset and BusReset */
+ usb3_set_bit(usb3, USB_COM_CON_DEV_ADDR(addr), USB3_USB_COM_CON);
+}
+
+static bool usb3_std_req_set_address(struct renesas_usb3 *usb3,
+ struct usb_ctrlrequest *ctrl)
+{
+ if (le16_to_cpu(ctrl->wValue) >= 128)
+ return true; /* stall */
+
+ usb3_set_device_address(usb3, le16_to_cpu(ctrl->wValue));
+ usb3_set_p0_con_for_no_data(usb3);
+
+ return false;
+}
+
+static void usb3_pipe0_internal_xfer(struct renesas_usb3 *usb3,
+ void *tx_data, size_t len,
+ void (*complete)(struct usb_ep *ep,
+ struct usb_request *req))
+{
+ struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
+
+ if (tx_data)
+ memcpy(usb3->ep0_buf, tx_data,
+ min_t(size_t, len, USB3_EP0_BUF_SIZE));
+
+ usb3->ep0_req->buf = &usb3->ep0_buf;
+ usb3->ep0_req->length = len;
+ usb3->ep0_req->complete = complete;
+ renesas_usb3_ep_queue(&usb3_ep->ep, usb3->ep0_req, GFP_ATOMIC);
+}
+
+static void usb3_pipe0_get_status_completion(struct usb_ep *ep,
+ struct usb_request *req)
+{
+}
+
+static bool usb3_std_req_get_status(struct renesas_usb3 *usb3,
+ struct usb_ctrlrequest *ctrl)
+{
+ bool stall = false;
+ struct renesas_usb3_ep *usb3_ep;
+ int num;
+ u16 status = 0;
+ __le16 tx_data;
+
+ switch (ctrl->bRequestType & USB_RECIP_MASK) {
+ case USB_RECIP_DEVICE:
+ if (usb3->gadget.is_selfpowered)
+ status |= 1 << USB_DEVICE_SELF_POWERED;
+ if (usb3->gadget.speed == USB_SPEED_SUPER)
+ status |= usb3_feature_get_un_enabled(usb3);
+ break;
+ case USB_RECIP_INTERFACE:
+ break;
+ case USB_RECIP_ENDPOINT:
+ num = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
+ usb3_ep = usb3_get_ep(usb3, num);
+ if (usb3_ep->halt)
+ status |= 1 << USB_ENDPOINT_HALT;
+ break;
+ default:
+ stall = true;
+ break;
+ }
+
+ if (!stall) {
+ tx_data = cpu_to_le16(status);
+ dev_dbg(usb3_to_dev(usb3), "get_status: req = %p\n",
+ usb_req_to_usb3_req(usb3->ep0_req));
+ usb3_pipe0_internal_xfer(usb3, &tx_data, sizeof(tx_data),
+ usb3_pipe0_get_status_completion);
+ }
+
+ return stall;
+}
+
+static bool usb3_std_req_feature_device(struct renesas_usb3 *usb3,
+ struct usb_ctrlrequest *ctrl, bool set)
+{
+ bool stall = true;
+ u16 w_value = le16_to_cpu(ctrl->wValue);
+
+ switch (w_value) {
+ case USB_DEVICE_TEST_MODE:
+ if (!set)
+ break;
+ usb3->test_mode = le16_to_cpu(ctrl->wIndex) >> 8;
+ stall = false;
+ break;
+ case USB_DEVICE_U1_ENABLE:
+ case USB_DEVICE_U2_ENABLE:
+ if (usb3->gadget.speed != USB_SPEED_SUPER)
+ break;
+ if (w_value == USB_DEVICE_U1_ENABLE)
+ usb3_feature_u1_enable(usb3, set);
+ if (w_value == USB_DEVICE_U2_ENABLE)
+ usb3_feature_u2_enable(usb3, set);
+ stall = false;
+ break;
+ default:
+ break;
+ }
+
+ return stall;
+}
+
+static int usb3_set_halt_p0(struct renesas_usb3_ep *usb3_ep, bool halt)
+{
+ struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+
+ if (unlikely(usb3_ep->num))
+ return -EINVAL;
+
+ usb3_ep->halt = halt;
+ if (halt)
+ usb3_set_p0_con_stall(usb3);
+ else
+ usb3_set_p0_con_stop(usb3);
+
+ return 0;
+}
+
+static int usb3_set_halt_pn(struct renesas_usb3_ep *usb3_ep, bool halt,
+ bool is_clear_feature)
+{
+ struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+ unsigned long flags;
+
+ spin_lock_irqsave(&usb3->lock, flags);
+ if (!usb3_pn_change(usb3, usb3_ep->num)) {
+ usb3_ep->halt = halt;
+ if (halt) {
+ usb3_pn_stall(usb3);
+ } else if (!is_clear_feature || !usb3_ep->wedge) {
+ usb3_pn_con_clear(usb3);
+ usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON);
+ usb3_pn_stop(usb3);
+ }
+ }
+ spin_unlock_irqrestore(&usb3->lock, flags);
+
+ return 0;
+}
+
+static int usb3_set_halt(struct renesas_usb3_ep *usb3_ep, bool halt,
+ bool is_clear_feature)
+{
+ int ret = 0;
+
+ if (halt && usb3_ep->started)
+ return -EAGAIN;
+
+ if (usb3_ep->num)
+ ret = usb3_set_halt_pn(usb3_ep, halt, is_clear_feature);
+ else
+ ret = usb3_set_halt_p0(usb3_ep, halt);
+
+ return ret;
+}
+
+static bool usb3_std_req_feature_endpoint(struct renesas_usb3 *usb3,
+ struct usb_ctrlrequest *ctrl,
+ bool set)
+{
+ int num = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
+ struct renesas_usb3_ep *usb3_ep;
+ struct renesas_usb3_request *usb3_req;
+
+ if (le16_to_cpu(ctrl->wValue) != USB_ENDPOINT_HALT)
+ return true; /* stall */
+
+ usb3_ep = usb3_get_ep(usb3, num);
+ usb3_set_halt(usb3_ep, set, true);
+
+ /* Restarts a queue if clear feature */
+ if (!set) {
+ usb3_ep->started = false;
+ usb3_req = usb3_get_request(usb3_ep);
+ if (usb3_req)
+ usb3_start_pipen(usb3_ep, usb3_req);
+ }
+
+ return false;
+}
+
+static bool usb3_std_req_feature(struct renesas_usb3 *usb3,
+ struct usb_ctrlrequest *ctrl, bool set)
+{
+ bool stall = false;
+
+ switch (ctrl->bRequestType & USB_RECIP_MASK) {
+ case USB_RECIP_DEVICE:
+ stall = usb3_std_req_feature_device(usb3, ctrl, set);
+ break;
+ case USB_RECIP_INTERFACE:
+ break;
+ case USB_RECIP_ENDPOINT:
+ stall = usb3_std_req_feature_endpoint(usb3, ctrl, set);
+ break;
+ default:
+ stall = true;
+ break;
+ }
+
+ if (!stall)
+ usb3_set_p0_con_for_no_data(usb3);
+
+ return stall;
+}
+
+static void usb3_pipe0_set_sel_completion(struct usb_ep *ep,
+ struct usb_request *req)
+{
+ /* TODO */
+}
+
+static bool usb3_std_req_set_sel(struct renesas_usb3 *usb3,
+ struct usb_ctrlrequest *ctrl)
+{
+ u16 w_length = le16_to_cpu(ctrl->wLength);
+
+ if (w_length != 6)
+ return true; /* stall */
+
+ dev_dbg(usb3_to_dev(usb3), "set_sel: req = %p\n",
+ usb_req_to_usb3_req(usb3->ep0_req));
+ usb3_pipe0_internal_xfer(usb3, NULL, 6, usb3_pipe0_set_sel_completion);
+
+ return false;
+}
+
+static bool usb3_std_req_set_configuration(struct renesas_usb3 *usb3,
+ struct usb_ctrlrequest *ctrl)
+{
+ if (le16_to_cpu(ctrl->wValue) > 0)
+ usb3_set_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON);
+ else
+ usb3_clear_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON);
+
+ return false;
+}
+
+/**
+ * usb3_handle_standard_request - handle some standard requests
+ * @usb3: the renesas_usb3 pointer
+ * @ctrl: a pointer of setup data
+ *
+ * Returns true if this function handled a standard request
+ */
+static bool usb3_handle_standard_request(struct renesas_usb3 *usb3,
+ struct usb_ctrlrequest *ctrl)
+{
+ bool ret = false;
+ bool stall = false;
+
+ if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
+ switch (ctrl->bRequest) {
+ case USB_REQ_SET_ADDRESS:
+ stall = usb3_std_req_set_address(usb3, ctrl);
+ ret = true;
+ break;
+ case USB_REQ_GET_STATUS:
+ stall = usb3_std_req_get_status(usb3, ctrl);
+ ret = true;
+ break;
+ case USB_REQ_CLEAR_FEATURE:
+ stall = usb3_std_req_feature(usb3, ctrl, false);
+ ret = true;
+ break;
+ case USB_REQ_SET_FEATURE:
+ stall = usb3_std_req_feature(usb3, ctrl, true);
+ ret = true;
+ break;
+ case USB_REQ_SET_SEL:
+ stall = usb3_std_req_set_sel(usb3, ctrl);
+ ret = true;
+ break;
+ case USB_REQ_SET_ISOCH_DELAY:
+ /* This hardware doesn't support Isochronous xfer */
+ stall = true;
+ ret = true;
+ break;
+ case USB_REQ_SET_CONFIGURATION:
+ usb3_std_req_set_configuration(usb3, ctrl);
+ break;
+ default:
+ break;
+ }
+ }
+
+ if (stall)
+ usb3_set_p0_con_stall(usb3);
+
+ return ret;
+}
+
+static int usb3_p0_con_clear_buffer(struct renesas_usb3 *usb3)
+{
+ usb3_set_bit(usb3, P0_CON_BCLR, USB3_P0_CON);
+
+ return usb3_wait(usb3, USB3_P0_CON, P0_CON_BCLR, 0);
+}
+
+static void usb3_irq_epc_pipe0_setup(struct renesas_usb3 *usb3)
+{
+ struct usb_ctrlrequest ctrl;
+ struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
+
+ /* Call giveback function if previous transfer is not completed */
+ if (usb3_ep->started)
+ usb3_request_done(usb3_ep, usb3_get_request(usb3_ep),
+ -ECONNRESET);
+
+ usb3_p0_con_clear_buffer(usb3);
+ usb3_get_setup_data(usb3, &ctrl);
+ if (!usb3_handle_standard_request(usb3, &ctrl))
+ if (usb3->driver->setup(&usb3->gadget, &ctrl) < 0)
+ usb3_set_p0_con_stall(usb3);
+}
+
+static void usb3_irq_epc_pipe0_bfrdy(struct renesas_usb3 *usb3)
+{
+ struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
+ struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
+
+ if (!usb3_req)
+ return;
+
+ usb3_p0_xfer(usb3_ep, usb3_req);
+}
+
+static void usb3_irq_epc_pipe0(struct renesas_usb3 *usb3)
+{
+ u32 p0_int_sta = usb3_read(usb3, USB3_P0_INT_STA);
+
+ p0_int_sta &= usb3_read(usb3, USB3_P0_INT_ENA);
+ usb3_write(usb3, p0_int_sta, USB3_P0_INT_STA);
+ if (p0_int_sta & P0_INT_STSED)
+ usb3_irq_epc_pipe0_status_end(usb3);
+ if (p0_int_sta & P0_INT_SETUP)
+ usb3_irq_epc_pipe0_setup(usb3);
+ if (p0_int_sta & P0_INT_BFRDY)
+ usb3_irq_epc_pipe0_bfrdy(usb3);
+}
+
+static void usb3_request_done_pipen(struct renesas_usb3 *usb3,
+ struct renesas_usb3_ep *usb3_ep,
+ struct renesas_usb3_request *usb3_req,
+ int status)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&usb3->lock, flags);
+ if (usb3_pn_change(usb3, usb3_ep->num))
+ usb3_pn_stop(usb3);
+ spin_unlock_irqrestore(&usb3->lock, flags);
+
+ usb3_disable_pipe_irq(usb3, usb3_ep->num);
+ usb3_request_done(usb3_ep, usb3_req, status);
+
+ /* get next usb3_req */
+ usb3_req = usb3_get_request(usb3_ep);
+ if (usb3_req)
+ usb3_start_pipen(usb3_ep, usb3_req);
+}
+
+static void usb3_irq_epc_pipen_lsttr(struct renesas_usb3 *usb3, int num)
+{
+ struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, num);
+ struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
+
+ if (!usb3_req)
+ return;
+
+ if (usb3_ep->dir_in) {
+ dev_dbg(usb3_to_dev(usb3), "%s: len = %u, actual = %u\n",
+ __func__, usb3_req->req.length, usb3_req->req.actual);
+ usb3_request_done_pipen(usb3, usb3_ep, usb3_req, 0);
+ }
+}
+
+static void usb3_irq_epc_pipen_bfrdy(struct renesas_usb3 *usb3, int num)
+{
+ struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, num);
+ struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
+ bool done = false;
+
+ if (!usb3_req)
+ return;
+
+ spin_lock(&usb3->lock);
+ if (usb3_pn_change(usb3, num))
+ goto out;
+
+ if (usb3_ep->dir_in) {
+ /* Do not stop the IN pipe here to detect LSTTR interrupt */
+ if (!usb3_write_pipe(usb3_ep, usb3_req, USB3_PN_WRITE))
+ usb3_clear_bit(usb3, PN_INT_BFRDY, USB3_PN_INT_ENA);
+ } else {
+ if (!usb3_read_pipe(usb3_ep, usb3_req, USB3_PN_READ))
+ done = true;
+ }
+
+out:
+ /* need to unlock because usb3_request_done_pipen() locks it */
+ spin_unlock(&usb3->lock);
+
+ if (done)
+ usb3_request_done_pipen(usb3, usb3_ep, usb3_req, 0);
+}
+
+static void usb3_irq_epc_pipen(struct renesas_usb3 *usb3, int num)
+{
+ u32 pn_int_sta;
+
+ spin_lock(&usb3->lock);
+ if (usb3_pn_change(usb3, num) < 0) {
+ spin_unlock(&usb3->lock);
+ return;
+ }
+
+ pn_int_sta = usb3_read(usb3, USB3_PN_INT_STA);
+ pn_int_sta &= usb3_read(usb3, USB3_PN_INT_ENA);
+ usb3_write(usb3, pn_int_sta, USB3_PN_INT_STA);
+ spin_unlock(&usb3->lock);
+ if (pn_int_sta & PN_INT_LSTTR)
+ usb3_irq_epc_pipen_lsttr(usb3, num);
+ if (pn_int_sta & PN_INT_BFRDY)
+ usb3_irq_epc_pipen_bfrdy(usb3, num);
+}
+
+static void usb3_irq_epc_int_2(struct renesas_usb3 *usb3, u32 int_sta_2)
+{
+ int i;
+
+ for (i = 0; i < usb3->num_usb3_eps; i++) {
+ if (int_sta_2 & USB_INT_2_PIPE(i)) {
+ if (!i)
+ usb3_irq_epc_pipe0(usb3);
+ else
+ usb3_irq_epc_pipen(usb3, i);
+ }
+ }
+}
+
+static void usb3_irq_idmon_change(struct renesas_usb3 *usb3)
+{
+ usb3_check_id(usb3);
+}
+
+static void usb3_irq_otg_int(struct renesas_usb3 *usb3)
+{
+ u32 otg_int_sta = usb3_read(usb3, USB3_USB_OTG_INT_STA(usb3));
+
+ otg_int_sta &= usb3_read(usb3, USB3_USB_OTG_INT_ENA(usb3));
+ if (otg_int_sta)
+ usb3_write(usb3, otg_int_sta, USB3_USB_OTG_INT_STA(usb3));
+
+ if (otg_int_sta & USB_OTG_IDMON(usb3))
+ usb3_irq_idmon_change(usb3);
+}
+
+static void usb3_irq_epc(struct renesas_usb3 *usb3)
+{
+ u32 int_sta_1 = usb3_read(usb3, USB3_USB_INT_STA_1);
+ u32 int_sta_2 = usb3_read(usb3, USB3_USB_INT_STA_2);
+
+ int_sta_1 &= usb3_read(usb3, USB3_USB_INT_ENA_1);
+ if (int_sta_1) {
+ usb3_write(usb3, int_sta_1, USB3_USB_INT_STA_1);
+ usb3_irq_epc_int_1(usb3, int_sta_1);
+ }
+
+ int_sta_2 &= usb3_read(usb3, USB3_USB_INT_ENA_2);
+ if (int_sta_2)
+ usb3_irq_epc_int_2(usb3, int_sta_2);
+
+ if (!usb3->is_rzv2m)
+ usb3_irq_otg_int(usb3);
+}
+
+static void usb3_irq_dma_int(struct renesas_usb3 *usb3, u32 dma_sta)
+{
+ struct renesas_usb3_ep *usb3_ep;
+ struct renesas_usb3_request *usb3_req;
+ int i, status;
+
+ for (i = 0; i < usb3->num_usb3_eps; i++) {
+ if (!(dma_sta & DMA_INT(i)))
+ continue;
+
+ usb3_ep = usb3_get_ep(usb3, i);
+ if (!(usb3_read(usb3, USB3_AXI_INT_STA) &
+ AXI_INT_PRDEN_CLR_STA(usb3_ep->dma->num)))
+ continue;
+
+ usb3_req = usb3_get_request(usb3_ep);
+ status = usb3_dma_try_stop(usb3_ep, usb3_req);
+ usb3_request_done_pipen(usb3, usb3_ep, usb3_req, status);
+ }
+}
+
+static void usb3_irq_dma(struct renesas_usb3 *usb3)
+{
+ u32 dma_sta = usb3_read(usb3, USB3_DMA_INT_STA);
+
+ dma_sta &= usb3_read(usb3, USB3_DMA_INT_ENA);
+ if (dma_sta) {
+ usb3_write(usb3, dma_sta, USB3_DMA_INT_STA);
+ usb3_irq_dma_int(usb3, dma_sta);
+ }
+}
+
+static irqreturn_t renesas_usb3_irq(int irq, void *_usb3)
+{
+ struct renesas_usb3 *usb3 = _usb3;
+ irqreturn_t ret = IRQ_NONE;
+ u32 axi_int_sta = usb3_read(usb3, USB3_AXI_INT_STA);
+
+ if (axi_int_sta & AXI_INT_DMAINT) {
+ usb3_irq_dma(usb3);
+ ret = IRQ_HANDLED;
+ }
+
+ if (axi_int_sta & AXI_INT_EPCINT) {
+ usb3_irq_epc(usb3);
+ ret = IRQ_HANDLED;
+ }
+
+ return ret;
+}
+
+static irqreturn_t renesas_usb3_otg_irq(int irq, void *_usb3)
+{
+ struct renesas_usb3 *usb3 = _usb3;
+
+ usb3_irq_otg_int(usb3);
+
+ return IRQ_HANDLED;
+}
+
+static void usb3_write_pn_mod(struct renesas_usb3_ep *usb3_ep,
+ const struct usb_endpoint_descriptor *desc)
+{
+ struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+ u32 val = 0;
+
+ val |= usb3_ep->dir_in ? PN_MOD_DIR : 0;
+ val |= PN_MOD_TYPE(usb_endpoint_type(desc));
+ val |= PN_MOD_EPNUM(usb_endpoint_num(desc));
+ usb3_write(usb3, val, USB3_PN_MOD);
+}
+
+static u32 usb3_calc_ramarea(int ram_size)
+{
+ WARN_ON(ram_size > SZ_16K);
+
+ if (ram_size <= SZ_1K)
+ return PN_RAMMAP_RAMAREA_1KB;
+ else if (ram_size <= SZ_2K)
+ return PN_RAMMAP_RAMAREA_2KB;
+ else if (ram_size <= SZ_4K)
+ return PN_RAMMAP_RAMAREA_4KB;
+ else if (ram_size <= SZ_8K)
+ return PN_RAMMAP_RAMAREA_8KB;
+ else
+ return PN_RAMMAP_RAMAREA_16KB;
+}
+
+static u32 usb3_calc_rammap_val(struct renesas_usb3_ep *usb3_ep,
+ const struct usb_endpoint_descriptor *desc)
+{
+ int i;
+ static const u32 max_packet_array[] = {8, 16, 32, 64, 512};
+ u32 mpkt = PN_RAMMAP_MPKT(1024);
+
+ for (i = 0; i < ARRAY_SIZE(max_packet_array); i++) {
+ if (usb_endpoint_maxp(desc) <= max_packet_array[i])
+ mpkt = PN_RAMMAP_MPKT(max_packet_array[i]);
+ }
+
+ return usb3_ep->rammap_val | mpkt;
+}
+
+static int usb3_enable_pipe_n(struct renesas_usb3_ep *usb3_ep,
+ const struct usb_endpoint_descriptor *desc)
+{
+ struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+ unsigned long flags;
+
+ usb3_ep->dir_in = usb_endpoint_dir_in(desc);
+
+ spin_lock_irqsave(&usb3->lock, flags);
+ if (!usb3_pn_change(usb3, usb3_ep->num)) {
+ usb3_write_pn_mod(usb3_ep, desc);
+ usb3_write(usb3, usb3_calc_rammap_val(usb3_ep, desc),
+ USB3_PN_RAMMAP);
+ usb3_pn_con_clear(usb3);
+ usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON);
+ }
+ spin_unlock_irqrestore(&usb3->lock, flags);
+
+ return 0;
+}
+
+static int usb3_disable_pipe_n(struct renesas_usb3_ep *usb3_ep)
+{
+ struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+ unsigned long flags;
+
+ usb3_ep->halt = false;
+
+ spin_lock_irqsave(&usb3->lock, flags);
+ if (!usb3_pn_change(usb3, usb3_ep->num)) {
+ usb3_write(usb3, 0, USB3_PN_INT_ENA);
+ usb3_write(usb3, 0, USB3_PN_RAMMAP);
+ usb3_clear_bit(usb3, PN_CON_EN, USB3_PN_CON);
+ }
+ spin_unlock_irqrestore(&usb3->lock, flags);
+
+ return 0;
+}
+
+/*------- usb_ep_ops -----------------------------------------------------*/
+static int renesas_usb3_ep_enable(struct usb_ep *_ep,
+ const struct usb_endpoint_descriptor *desc)
+{
+ struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
+
+ return usb3_enable_pipe_n(usb3_ep, desc);
+}
+
+static int renesas_usb3_ep_disable(struct usb_ep *_ep)
+{
+ struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
+ struct renesas_usb3_request *usb3_req;
+
+ do {
+ usb3_req = usb3_get_request(usb3_ep);
+ if (!usb3_req)
+ break;
+ usb3_dma_try_stop(usb3_ep, usb3_req);
+ usb3_request_done(usb3_ep, usb3_req, -ESHUTDOWN);
+ } while (1);
+
+ return usb3_disable_pipe_n(usb3_ep);
+}
+
+static struct usb_request *__renesas_usb3_ep_alloc_request(gfp_t gfp_flags)
+{
+ struct renesas_usb3_request *usb3_req;
+
+ usb3_req = kzalloc(sizeof(struct renesas_usb3_request), gfp_flags);
+ if (!usb3_req)
+ return NULL;
+
+ INIT_LIST_HEAD(&usb3_req->queue);
+
+ return &usb3_req->req;
+}
+
+static void __renesas_usb3_ep_free_request(struct usb_request *_req)
+{
+ struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req);
+
+ kfree(usb3_req);
+}
+
+static struct usb_request *renesas_usb3_ep_alloc_request(struct usb_ep *_ep,
+ gfp_t gfp_flags)
+{
+ return __renesas_usb3_ep_alloc_request(gfp_flags);
+}
+
+static void renesas_usb3_ep_free_request(struct usb_ep *_ep,
+ struct usb_request *_req)
+{
+ __renesas_usb3_ep_free_request(_req);
+}
+
+static int renesas_usb3_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
+{
+ struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
+ struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req);
+ struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+
+ dev_dbg(usb3_to_dev(usb3), "ep_dequeue: ep%2d, %u\n", usb3_ep->num,
+ _req->length);
+
+ usb3_dma_try_stop(usb3_ep, usb3_req);
+ usb3_request_done_pipen(usb3, usb3_ep, usb3_req, -ECONNRESET);
+
+ return 0;
+}
+
+static int renesas_usb3_ep_set_halt(struct usb_ep *_ep, int value)
+{
+ return usb3_set_halt(usb_ep_to_usb3_ep(_ep), !!value, false);
+}
+
+static int renesas_usb3_ep_set_wedge(struct usb_ep *_ep)
+{
+ struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
+
+ usb3_ep->wedge = true;
+ return usb3_set_halt(usb3_ep, true, false);
+}
+
+static void renesas_usb3_ep_fifo_flush(struct usb_ep *_ep)
+{
+ struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
+ struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+ unsigned long flags;
+
+ if (usb3_ep->num) {
+ spin_lock_irqsave(&usb3->lock, flags);
+ if (!usb3_pn_change(usb3, usb3_ep->num)) {
+ usb3_pn_con_clear(usb3);
+ usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON);
+ }
+ spin_unlock_irqrestore(&usb3->lock, flags);
+ } else {
+ usb3_p0_con_clear_buffer(usb3);
+ }
+}
+
+static const struct usb_ep_ops renesas_usb3_ep_ops = {
+ .enable = renesas_usb3_ep_enable,
+ .disable = renesas_usb3_ep_disable,
+
+ .alloc_request = renesas_usb3_ep_alloc_request,
+ .free_request = renesas_usb3_ep_free_request,
+
+ .queue = renesas_usb3_ep_queue,
+ .dequeue = renesas_usb3_ep_dequeue,
+
+ .set_halt = renesas_usb3_ep_set_halt,
+ .set_wedge = renesas_usb3_ep_set_wedge,
+ .fifo_flush = renesas_usb3_ep_fifo_flush,
+};
+
+/*------- usb_gadget_ops -------------------------------------------------*/
+static int renesas_usb3_start(struct usb_gadget *gadget,
+ struct usb_gadget_driver *driver)
+{
+ struct renesas_usb3 *usb3;
+
+ if (!driver || driver->max_speed < USB_SPEED_FULL ||
+ !driver->setup)
+ return -EINVAL;
+
+ usb3 = gadget_to_renesas_usb3(gadget);
+
+ /* hook up the driver */
+ usb3->driver = driver;
+
+ if (usb3->phy)
+ phy_init(usb3->phy);
+
+ pm_runtime_get_sync(usb3_to_dev(usb3));
+
+ renesas_usb3_init_controller(usb3);
+
+ return 0;
+}
+
+static int renesas_usb3_stop(struct usb_gadget *gadget)
+{
+ struct renesas_usb3 *usb3 = gadget_to_renesas_usb3(gadget);
+
+ usb3->softconnect = false;
+ usb3->gadget.speed = USB_SPEED_UNKNOWN;
+ usb3->driver = NULL;
+ renesas_usb3_stop_controller(usb3);
+
+ if (usb3->phy)
+ phy_exit(usb3->phy);
+
+ pm_runtime_put(usb3_to_dev(usb3));
+
+ return 0;
+}
+
+static int renesas_usb3_get_frame(struct usb_gadget *_gadget)
+{
+ return -EOPNOTSUPP;
+}
+
+static int renesas_usb3_pullup(struct usb_gadget *gadget, int is_on)
+{
+ struct renesas_usb3 *usb3 = gadget_to_renesas_usb3(gadget);
+
+ usb3->softconnect = !!is_on;
+
+ return 0;
+}
+
+static int renesas_usb3_set_selfpowered(struct usb_gadget *gadget, int is_self)
+{
+ gadget->is_selfpowered = !!is_self;
+
+ return 0;
+}
+
+static const struct usb_gadget_ops renesas_usb3_gadget_ops = {
+ .get_frame = renesas_usb3_get_frame,
+ .udc_start = renesas_usb3_start,
+ .udc_stop = renesas_usb3_stop,
+ .pullup = renesas_usb3_pullup,
+ .set_selfpowered = renesas_usb3_set_selfpowered,
+};
+
+static enum usb_role renesas_usb3_role_switch_get(struct usb_role_switch *sw)
+{
+ struct renesas_usb3 *usb3 = usb_role_switch_get_drvdata(sw);
+ enum usb_role cur_role;
+
+ pm_runtime_get_sync(usb3_to_dev(usb3));
+ cur_role = usb3_is_host(usb3) ? USB_ROLE_HOST : USB_ROLE_DEVICE;
+ pm_runtime_put(usb3_to_dev(usb3));
+
+ return cur_role;
+}
+
+static void handle_ext_role_switch_states(struct device *dev,
+ enum usb_role role)
+{
+ struct renesas_usb3 *usb3 = dev_get_drvdata(dev);
+ struct device *host = usb3->host_dev;
+ enum usb_role cur_role = renesas_usb3_role_switch_get(usb3->role_sw);
+
+ switch (role) {
+ case USB_ROLE_NONE:
+ usb3->connection_state = USB_ROLE_NONE;
+ if (cur_role == USB_ROLE_HOST)
+ device_release_driver(host);
+ if (usb3->driver)
+ usb3_disconnect(usb3);
+ usb3_vbus_out(usb3, false);
+ break;
+ case USB_ROLE_DEVICE:
+ if (usb3->connection_state == USB_ROLE_NONE) {
+ usb3->connection_state = USB_ROLE_DEVICE;
+ usb3_set_mode(usb3, false);
+ if (usb3->driver)
+ usb3_connect(usb3);
+ } else if (cur_role == USB_ROLE_HOST) {
+ device_release_driver(host);
+ usb3_set_mode(usb3, false);
+ if (usb3->driver)
+ usb3_connect(usb3);
+ }
+ usb3_vbus_out(usb3, false);
+ break;
+ case USB_ROLE_HOST:
+ if (usb3->connection_state == USB_ROLE_NONE) {
+ if (usb3->driver)
+ usb3_disconnect(usb3);
+
+ usb3->connection_state = USB_ROLE_HOST;
+ usb3_set_mode(usb3, true);
+ usb3_vbus_out(usb3, true);
+ if (device_attach(host) < 0)
+ dev_err(dev, "device_attach(host) failed\n");
+ } else if (cur_role == USB_ROLE_DEVICE) {
+ usb3_disconnect(usb3);
+ /* Must set the mode before device_attach of the host */
+ usb3_set_mode(usb3, true);
+ /* This device_attach() might sleep */
+ if (device_attach(host) < 0)
+ dev_err(dev, "device_attach(host) failed\n");
+ }
+ break;
+ default:
+ break;
+ }
+}
+
+static void handle_role_switch_states(struct device *dev,
+ enum usb_role role)
+{
+ struct renesas_usb3 *usb3 = dev_get_drvdata(dev);
+ struct device *host = usb3->host_dev;
+ enum usb_role cur_role = renesas_usb3_role_switch_get(usb3->role_sw);
+
+ if (cur_role == USB_ROLE_HOST && role == USB_ROLE_DEVICE) {
+ device_release_driver(host);
+ usb3_set_mode(usb3, false);
+ } else if (cur_role == USB_ROLE_DEVICE && role == USB_ROLE_HOST) {
+ /* Must set the mode before device_attach of the host */
+ usb3_set_mode(usb3, true);
+ /* This device_attach() might sleep */
+ if (device_attach(host) < 0)
+ dev_err(dev, "device_attach(host) failed\n");
+ }
+}
+
+static int renesas_usb3_role_switch_set(struct usb_role_switch *sw,
+ enum usb_role role)
+{
+ struct renesas_usb3 *usb3 = usb_role_switch_get_drvdata(sw);
+
+ pm_runtime_get_sync(usb3_to_dev(usb3));
+
+ if (usb3->role_sw_by_connector)
+ handle_ext_role_switch_states(usb3_to_dev(usb3), role);
+ else
+ handle_role_switch_states(usb3_to_dev(usb3), role);
+
+ pm_runtime_put(usb3_to_dev(usb3));
+
+ return 0;
+}
+
+static ssize_t role_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct renesas_usb3 *usb3 = dev_get_drvdata(dev);
+ bool new_mode_is_host;
+
+ if (!usb3->driver)
+ return -ENODEV;
+
+ if (usb3->forced_b_device)
+ return -EBUSY;
+
+ if (sysfs_streq(buf, "host"))
+ new_mode_is_host = true;
+ else if (sysfs_streq(buf, "peripheral"))
+ new_mode_is_host = false;
+ else
+ return -EINVAL;
+
+ if (new_mode_is_host == usb3_is_host(usb3))
+ return -EINVAL;
+
+ usb3_mode_config(usb3, new_mode_is_host, usb3_is_a_device(usb3));
+
+ return count;
+}
+
+static ssize_t role_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct renesas_usb3 *usb3 = dev_get_drvdata(dev);
+
+ if (!usb3->driver)
+ return -ENODEV;
+
+ return sprintf(buf, "%s\n", usb3_is_host(usb3) ? "host" : "peripheral");
+}
+static DEVICE_ATTR_RW(role);
+
+static int renesas_usb3_b_device_show(struct seq_file *s, void *unused)
+{
+ struct renesas_usb3 *usb3 = s->private;
+
+ seq_printf(s, "%d\n", usb3->forced_b_device);
+
+ return 0;
+}
+
+static int renesas_usb3_b_device_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, renesas_usb3_b_device_show, inode->i_private);
+}
+
+static ssize_t renesas_usb3_b_device_write(struct file *file,
+ const char __user *ubuf,
+ size_t count, loff_t *ppos)
+{
+ struct seq_file *s = file->private_data;
+ struct renesas_usb3 *usb3 = s->private;
+ char buf[32];
+
+ if (!usb3->driver)
+ return -ENODEV;
+
+ if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
+ return -EFAULT;
+
+ usb3->start_to_connect = false;
+ if (usb3->workaround_for_vbus && usb3->forced_b_device &&
+ !strncmp(buf, "2", 1))
+ usb3->start_to_connect = true;
+ else if (!strncmp(buf, "1", 1))
+ usb3->forced_b_device = true;
+ else
+ usb3->forced_b_device = false;
+
+ if (usb3->workaround_for_vbus)
+ usb3_disconnect(usb3);
+
+ /* Let this driver call usb3_connect() if needed */
+ usb3_check_id(usb3);
+
+ return count;
+}
+
+static const struct file_operations renesas_usb3_b_device_fops = {
+ .open = renesas_usb3_b_device_open,
+ .write = renesas_usb3_b_device_write,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static void renesas_usb3_debugfs_init(struct renesas_usb3 *usb3,
+ struct device *dev)
+{
+ usb3->dentry = debugfs_create_dir(dev_name(dev), usb_debug_root);
+
+ debugfs_create_file("b_device", 0644, usb3->dentry, usb3,
+ &renesas_usb3_b_device_fops);
+}
+
+/*------- platform_driver ------------------------------------------------*/
+static int renesas_usb3_remove(struct platform_device *pdev)
+{
+ struct renesas_usb3 *usb3 = platform_get_drvdata(pdev);
+
+ debugfs_remove_recursive(usb3->dentry);
+ device_remove_file(&pdev->dev, &dev_attr_role);
+
+ cancel_work_sync(&usb3->role_work);
+ usb_role_switch_unregister(usb3->role_sw);
+
+ usb_del_gadget_udc(&usb3->gadget);
+ reset_control_assert(usb3->usbp_rstc);
+ reset_control_assert(usb3->drd_rstc);
+ renesas_usb3_dma_free_prd(usb3, &pdev->dev);
+
+ __renesas_usb3_ep_free_request(usb3->ep0_req);
+ pm_runtime_disable(&pdev->dev);
+
+ return 0;
+}
+
+static int renesas_usb3_init_ep(struct renesas_usb3 *usb3, struct device *dev,
+ const struct renesas_usb3_priv *priv)
+{
+ struct renesas_usb3_ep *usb3_ep;
+ int i;
+
+ /* calculate num_usb3_eps from renesas_usb3_priv */
+ usb3->num_usb3_eps = priv->ramsize_per_ramif * priv->num_ramif * 2 /
+ priv->ramsize_per_pipe + 1;
+
+ if (usb3->num_usb3_eps > USB3_MAX_NUM_PIPES(usb3))
+ usb3->num_usb3_eps = USB3_MAX_NUM_PIPES(usb3);
+
+ usb3->usb3_ep = devm_kcalloc(dev,
+ usb3->num_usb3_eps, sizeof(*usb3_ep),
+ GFP_KERNEL);
+ if (!usb3->usb3_ep)
+ return -ENOMEM;
+
+ dev_dbg(dev, "%s: num_usb3_eps = %d\n", __func__, usb3->num_usb3_eps);
+ /*
+ * This driver prepares pipes as follows:
+ * - odd pipes = IN pipe
+ * - even pipes = OUT pipe (except pipe 0)
+ */
+ usb3_for_each_ep(usb3_ep, usb3, i) {
+ snprintf(usb3_ep->ep_name, sizeof(usb3_ep->ep_name), "ep%d", i);
+ usb3_ep->usb3 = usb3;
+ usb3_ep->num = i;
+ usb3_ep->ep.name = usb3_ep->ep_name;
+ usb3_ep->ep.ops = &renesas_usb3_ep_ops;
+ INIT_LIST_HEAD(&usb3_ep->queue);
+ INIT_LIST_HEAD(&usb3_ep->ep.ep_list);
+ if (!i) {
+ /* for control pipe */
+ usb3->gadget.ep0 = &usb3_ep->ep;
+ usb_ep_set_maxpacket_limit(&usb3_ep->ep,
+ USB3_EP0_SS_MAX_PACKET_SIZE);
+ usb3_ep->ep.caps.type_control = true;
+ usb3_ep->ep.caps.dir_in = true;
+ usb3_ep->ep.caps.dir_out = true;
+ continue;
+ }
+
+ /* for bulk or interrupt pipe */
+ usb_ep_set_maxpacket_limit(&usb3_ep->ep, ~0);
+ list_add_tail(&usb3_ep->ep.ep_list, &usb3->gadget.ep_list);
+ usb3_ep->ep.caps.type_bulk = true;
+ usb3_ep->ep.caps.type_int = true;
+ if (i & 1)
+ usb3_ep->ep.caps.dir_in = true;
+ else
+ usb3_ep->ep.caps.dir_out = true;
+ }
+
+ return 0;
+}
+
+static void renesas_usb3_init_ram(struct renesas_usb3 *usb3, struct device *dev,
+ const struct renesas_usb3_priv *priv)
+{
+ struct renesas_usb3_ep *usb3_ep;
+ int i;
+ u32 ramif[2], basead[2]; /* index 0 = for IN pipes */
+ u32 *cur_ramif, *cur_basead;
+ u32 val;
+
+ memset(ramif, 0, sizeof(ramif));
+ memset(basead, 0, sizeof(basead));
+
+ /*
+ * This driver prepares pipes as follows:
+ * - all pipes = the same size as "ramsize_per_pipe"
+ * Please refer to the "Method of Specifying RAM Mapping"
+ */
+ usb3_for_each_ep(usb3_ep, usb3, i) {
+ if (!i)
+ continue; /* out of scope if ep num = 0 */
+ if (usb3_ep->ep.caps.dir_in) {
+ cur_ramif = &ramif[0];
+ cur_basead = &basead[0];
+ } else {
+ cur_ramif = &ramif[1];
+ cur_basead = &basead[1];
+ }
+
+ if (*cur_basead > priv->ramsize_per_ramif)
+ continue; /* out of memory for IN or OUT pipe */
+
+ /* calculate rammap_val */
+ val = PN_RAMMAP_RAMIF(*cur_ramif);
+ val |= usb3_calc_ramarea(priv->ramsize_per_pipe);
+ val |= PN_RAMMAP_BASEAD(*cur_basead);
+ usb3_ep->rammap_val = val;
+
+ dev_dbg(dev, "ep%2d: val = %08x, ramif = %d, base = %x\n",
+ i, val, *cur_ramif, *cur_basead);
+
+ /* update current ramif */
+ if (*cur_ramif + 1 == priv->num_ramif) {
+ *cur_ramif = 0;
+ *cur_basead += priv->ramsize_per_pipe;
+ } else {
+ (*cur_ramif)++;
+ }
+ }
+}
+
+static const struct renesas_usb3_priv renesas_usb3_priv_r8a7795_es1 = {
+ .ramsize_per_ramif = SZ_16K,
+ .num_ramif = 2,
+ .ramsize_per_pipe = SZ_4K,
+ .workaround_for_vbus = true,
+};
+
+static const struct renesas_usb3_priv renesas_usb3_priv_gen3 = {
+ .ramsize_per_ramif = SZ_16K,
+ .num_ramif = 4,
+ .ramsize_per_pipe = SZ_4K,
+};
+
+static const struct renesas_usb3_priv renesas_usb3_priv_r8a77990 = {
+ .ramsize_per_ramif = SZ_16K,
+ .num_ramif = 4,
+ .ramsize_per_pipe = SZ_4K,
+ .workaround_for_vbus = true,
+};
+
+static const struct renesas_usb3_priv renesas_usb3_priv_rzv2m = {
+ .ramsize_per_ramif = SZ_16K,
+ .num_ramif = 1,
+ .ramsize_per_pipe = SZ_4K,
+ .is_rzv2m = true,
+};
+
+static const struct of_device_id usb3_of_match[] = {
+ {
+ .compatible = "renesas,r8a774c0-usb3-peri",
+ .data = &renesas_usb3_priv_r8a77990,
+ }, {
+ .compatible = "renesas,r8a7795-usb3-peri",
+ .data = &renesas_usb3_priv_gen3,
+ }, {
+ .compatible = "renesas,r8a77990-usb3-peri",
+ .data = &renesas_usb3_priv_r8a77990,
+ }, {
+ .compatible = "renesas,rzv2m-usb3-peri",
+ .data = &renesas_usb3_priv_rzv2m,
+ }, {
+ .compatible = "renesas,rcar-gen3-usb3-peri",
+ .data = &renesas_usb3_priv_gen3,
+ },
+ { },
+};
+MODULE_DEVICE_TABLE(of, usb3_of_match);
+
+static const struct soc_device_attribute renesas_usb3_quirks_match[] = {
+ {
+ .soc_id = "r8a7795", .revision = "ES1.*",
+ .data = &renesas_usb3_priv_r8a7795_es1,
+ },
+ { /* sentinel */ }
+};
+
+static const unsigned int renesas_usb3_cable[] = {
+ EXTCON_USB,
+ EXTCON_USB_HOST,
+ EXTCON_NONE,
+};
+
+static struct usb_role_switch_desc renesas_usb3_role_switch_desc = {
+ .set = renesas_usb3_role_switch_set,
+ .get = renesas_usb3_role_switch_get,
+ .allow_userspace_control = true,
+};
+
+static int renesas_usb3_probe(struct platform_device *pdev)
+{
+ struct renesas_usb3 *usb3;
+ int irq, drd_irq, ret;
+ const struct renesas_usb3_priv *priv;
+ const struct soc_device_attribute *attr;
+
+ attr = soc_device_match(renesas_usb3_quirks_match);
+ if (attr)
+ priv = attr->data;
+ else
+ priv = of_device_get_match_data(&pdev->dev);
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ if (priv->is_rzv2m) {
+ drd_irq = platform_get_irq_byname(pdev, "drd");
+ if (drd_irq < 0)
+ return drd_irq;
+ }
+
+ usb3 = devm_kzalloc(&pdev->dev, sizeof(*usb3), GFP_KERNEL);
+ if (!usb3)
+ return -ENOMEM;
+
+ usb3->is_rzv2m = priv->is_rzv2m;
+
+ usb3->reg = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(usb3->reg))
+ return PTR_ERR(usb3->reg);
+
+ platform_set_drvdata(pdev, usb3);
+ spin_lock_init(&usb3->lock);
+
+ usb3->gadget.ops = &renesas_usb3_gadget_ops;
+ usb3->gadget.name = udc_name;
+ usb3->gadget.max_speed = USB_SPEED_SUPER;
+ INIT_LIST_HEAD(&usb3->gadget.ep_list);
+ ret = renesas_usb3_init_ep(usb3, &pdev->dev, priv);
+ if (ret < 0)
+ return ret;
+ renesas_usb3_init_ram(usb3, &pdev->dev, priv);
+
+ ret = devm_request_irq(&pdev->dev, irq, renesas_usb3_irq, 0,
+ dev_name(&pdev->dev), usb3);
+ if (ret < 0)
+ return ret;
+
+ if (usb3->is_rzv2m) {
+ ret = devm_request_irq(&pdev->dev, drd_irq,
+ renesas_usb3_otg_irq, 0,
+ dev_name(&pdev->dev), usb3);
+ if (ret < 0)
+ return ret;
+ }
+
+ INIT_WORK(&usb3->extcon_work, renesas_usb3_extcon_work);
+ usb3->extcon = devm_extcon_dev_allocate(&pdev->dev, renesas_usb3_cable);
+ if (IS_ERR(usb3->extcon))
+ return PTR_ERR(usb3->extcon);
+
+ ret = devm_extcon_dev_register(&pdev->dev, usb3->extcon);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to register extcon\n");
+ return ret;
+ }
+
+ /* for ep0 handling */
+ usb3->ep0_req = __renesas_usb3_ep_alloc_request(GFP_KERNEL);
+ if (!usb3->ep0_req)
+ return -ENOMEM;
+
+ ret = renesas_usb3_dma_alloc_prd(usb3, &pdev->dev);
+ if (ret < 0)
+ goto err_alloc_prd;
+
+ /*
+ * This is optional. So, if this driver cannot get a phy,
+ * this driver will not handle a phy anymore.
+ */
+ usb3->phy = devm_phy_optional_get(&pdev->dev, "usb");
+ if (IS_ERR(usb3->phy)) {
+ ret = PTR_ERR(usb3->phy);
+ goto err_add_udc;
+ }
+
+ usb3->drd_rstc = devm_reset_control_get_optional_shared(&pdev->dev,
+ "drd_reset");
+ if (IS_ERR(usb3->drd_rstc)) {
+ ret = PTR_ERR(usb3->drd_rstc);
+ goto err_add_udc;
+ }
+
+ usb3->usbp_rstc = devm_reset_control_get_optional_shared(&pdev->dev,
+ "aresetn_p");
+ if (IS_ERR(usb3->usbp_rstc)) {
+ ret = PTR_ERR(usb3->usbp_rstc);
+ goto err_add_udc;
+ }
+
+ reset_control_deassert(usb3->drd_rstc);
+ reset_control_deassert(usb3->usbp_rstc);
+
+ pm_runtime_enable(&pdev->dev);
+ ret = usb_add_gadget_udc(&pdev->dev, &usb3->gadget);
+ if (ret < 0)
+ goto err_reset;
+
+ ret = device_create_file(&pdev->dev, &dev_attr_role);
+ if (ret < 0)
+ goto err_dev_create;
+
+ if (device_property_read_bool(&pdev->dev, "usb-role-switch")) {
+ usb3->role_sw_by_connector = true;
+ renesas_usb3_role_switch_desc.fwnode = dev_fwnode(&pdev->dev);
+ }
+
+ renesas_usb3_role_switch_desc.driver_data = usb3;
+
+ INIT_WORK(&usb3->role_work, renesas_usb3_role_work);
+ usb3->role_sw = usb_role_switch_register(&pdev->dev,
+ &renesas_usb3_role_switch_desc);
+ if (!IS_ERR(usb3->role_sw)) {
+ usb3->host_dev = usb_of_get_companion_dev(&pdev->dev);
+ if (!usb3->host_dev) {
+ /* If not found, this driver will not use a role sw */
+ usb_role_switch_unregister(usb3->role_sw);
+ usb3->role_sw = NULL;
+ }
+ } else {
+ usb3->role_sw = NULL;
+ }
+
+ usb3->workaround_for_vbus = priv->workaround_for_vbus;
+
+ renesas_usb3_debugfs_init(usb3, &pdev->dev);
+
+ dev_info(&pdev->dev, "probed%s\n", usb3->phy ? " with phy" : "");
+
+ return 0;
+
+err_dev_create:
+ usb_del_gadget_udc(&usb3->gadget);
+
+err_reset:
+ reset_control_assert(usb3->usbp_rstc);
+ reset_control_assert(usb3->drd_rstc);
+
+err_add_udc:
+ renesas_usb3_dma_free_prd(usb3, &pdev->dev);
+
+err_alloc_prd:
+ __renesas_usb3_ep_free_request(usb3->ep0_req);
+
+ return ret;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int renesas_usb3_suspend(struct device *dev)
+{
+ struct renesas_usb3 *usb3 = dev_get_drvdata(dev);
+
+ /* Not started */
+ if (!usb3->driver)
+ return 0;
+
+ renesas_usb3_stop_controller(usb3);
+ if (usb3->phy)
+ phy_exit(usb3->phy);
+ pm_runtime_put(dev);
+
+ return 0;
+}
+
+static int renesas_usb3_resume(struct device *dev)
+{
+ struct renesas_usb3 *usb3 = dev_get_drvdata(dev);
+
+ /* Not started */
+ if (!usb3->driver)
+ return 0;
+
+ if (usb3->phy)
+ phy_init(usb3->phy);
+ pm_runtime_get_sync(dev);
+ renesas_usb3_init_controller(usb3);
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(renesas_usb3_pm_ops, renesas_usb3_suspend,
+ renesas_usb3_resume);
+
+static struct platform_driver renesas_usb3_driver = {
+ .probe = renesas_usb3_probe,
+ .remove = renesas_usb3_remove,
+ .driver = {
+ .name = udc_name,
+ .pm = &renesas_usb3_pm_ops,
+ .of_match_table = of_match_ptr(usb3_of_match),
+ },
+};
+module_platform_driver(renesas_usb3_driver);
+
+MODULE_DESCRIPTION("Renesas USB3.0 Peripheral driver");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>");
+MODULE_ALIAS("platform:renesas_usb3");