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linux-stable/drivers/usb/gadget/udc/renesas_usb3.c
Rob Herring 484468fb0f usb: Explicitly include correct DT includes 
The DT of_device.h and of_platform.h date back to the separate
of_platform_bus_type before it as merged into the regular platform bus.
As part of that merge prepping Arm DT support 13 years ago, they
"temporarily" include each other. They also include platform_device.h
and of.h. As a result, there's a pretty much random mix of those include
files used throughout the tree. In order to detangle these headers and
replace the implicit includes with struct declarations, users need to
explicitly include the correct includes.

Acked-by: Herve Codina <herve.codina@bootlin.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230718143027.1064731-1-robh@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-07-25 18:20:02 +02:00

3028 lines
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// 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/device.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.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/uaccess.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/usb/of.h>
#include <linux/usb/role.h>
#include <linux/usb/rzv2m_usb3drd.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;
void __iomem *drd_reg;
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 void usb3_drd_write(struct renesas_usb3 *usb3, u32 data, u32 offs)
{
void __iomem *reg;
if (usb3->is_rzv2m)
reg = usb3->drd_reg + offs - USB3_DRD_CON(usb3);
else
reg = usb3->reg + offs;
iowrite32(data, reg);
}
static u32 usb3_drd_read(struct renesas_usb3 *usb3, u32 offs)
{
void __iomem *reg;
if (usb3->is_rzv2m)
reg = usb3->drd_reg + offs - USB3_DRD_CON(usb3);
else
reg = usb3->reg + offs;
return ioread32(reg);
}
static void usb3_drd_set_bit(struct renesas_usb3 *usb3, u32 bits, u32 offs)
{
u32 val = usb3_drd_read(usb3, offs);
val |= bits;
usb3_drd_write(usb3, val, offs);
}
static void usb3_drd_clear_bit(struct renesas_usb3 *usb3, u32 bits, u32 offs)
{
u32 val = usb3_drd_read(usb3, offs);
val &= ~bits;
usb3_drd_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_drd_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_drd_set_bit(usb3, DRD_CON_PERI_RST, USB3_DRD_CON(usb3));
usb3_drd_clear_bit(usb3, DRD_CON_HOST_RST, USB3_DRD_CON(usb3));
} else {
usb3_drd_set_bit(usb3, DRD_CON_HOST_RST, USB3_DRD_CON(usb3));
usb3_drd_clear_bit(usb3, DRD_CON_PERI_RST, USB3_DRD_CON(usb3));
}
}
if (host)
usb3_drd_clear_bit(usb3, DRD_CON_PERI_CON, USB3_DRD_CON(usb3));
else
usb3_drd_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_drd_set_bit(usb3, DRD_CON_VBOUT, USB3_DRD_CON(usb3));
else
usb3_drd_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_drd_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_drd_write(usb3, USB_OTG_IDMON(usb3), USB3_USB_OTG_INT_STA(usb3));
usb3_drd_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_drd_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_drd_read(usb3, USB3_USB_OTG_INT_STA(usb3));
otg_int_sta &= usb3_drd_read(usb3, USB3_USB_OTG_INT_ENA(usb3));
if (otg_int_sta)
usb3_drd_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);
if (usb3->is_rzv2m && usb3_is_a_device(usb3))
return -EBUSY;
/* hook up the driver */
usb3->driver = driver;
if (usb3->phy)
phy_init(usb3->phy);
pm_runtime_get_sync(usb3_to_dev(usb3));
/* Peripheral Reset */
if (usb3->is_rzv2m)
rzv2m_usb3drd_reset(usb3_to_dev(usb3)->parent, false);
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;
if (usb3->is_rzv2m)
rzv2m_usb3drd_reset(usb3_to_dev(usb3)->parent, false);
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 (!usb3->is_rzv2m && cur_role == USB_ROLE_HOST)
device_release_driver(host);
if (usb3->driver) {
if (usb3->is_rzv2m)
rzv2m_usb3drd_reset(dev->parent, false);
usb3_disconnect(usb3);
}
usb3_vbus_out(usb3, false);
if (usb3->is_rzv2m) {
rzv2m_usb3drd_reset(dev->parent, true);
device_release_driver(host);
}
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) {
if (usb3->is_rzv2m)
renesas_usb3_init_controller(usb3);
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) {
if (usb3->is_rzv2m)
rzv2m_usb3drd_reset(dev->parent, false);
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 void 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);
renesas_usb3_dma_free_prd(usb3, &pdev->dev);
__renesas_usb3_ep_free_request(usb3->ep0_req);
pm_runtime_disable(&pdev->dev);
}
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_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 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, ret;
const struct renesas_usb3_priv *priv;
priv = of_device_get_match_data(&pdev->dev);
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return 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) {
struct rzv2m_usb3drd *ddata = dev_get_drvdata(pdev->dev.parent);
usb3->drd_reg = ddata->reg;
ret = devm_request_irq(&pdev->dev, ddata->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->usbp_rstc = devm_reset_control_get_optional_shared(&pdev->dev,
NULL);
if (IS_ERR(usb3->usbp_rstc)) {
ret = PTR_ERR(usb3->usbp_rstc);
goto err_add_udc;
}
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);
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_new = renesas_usb3_remove,
.driver = {
.name = udc_name,
.pm = &renesas_usb3_pm_ops,
.of_match_table = 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");
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