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linux-sg2042/drivers/usb/gadget/udc/renesas_usb3.c

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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/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/sizes.h>
#include <linux/slab.h>
#include <linux/sys_soc.h>
#include <linux/uaccess.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.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 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 0x268
#define USB3_USB_OTG_INT_STA 0x26c
#define USB3_USB_OTG_INT_ENA 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_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 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 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 */
};
struct renesas_usb3 {
void __iomem *reg;
struct usb_gadget gadget;
struct usb_gadget_driver *driver;
struct extcon_dev *extcon;
struct work_struct extcon_work;
struct phy *phy;
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;
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;
};
#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) & 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);
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);
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 usb3_set_mode(struct renesas_usb3 *usb3, bool host)
{
if (host)
usb3_clear_bit(usb3, DRD_CON_PERI_CON, USB3_DRD_CON);
else
usb3_set_bit(usb3, DRD_CON_PERI_CON, USB3_DRD_CON);
}
static void usb3_vbus_out(struct renesas_usb3 *usb3, bool enable)
{
if (enable)
usb3_set_bit(usb3, DRD_CON_VBOUT, USB3_DRD_CON);
else
usb3_clear_bit(usb3, DRD_CON_VBOUT, USB3_DRD_CON);
}
static void usb3_mode_config(struct renesas_usb3 *usb3, bool host, bool a_dev)
{
unsigned long flags;
spin_lock_irqsave(&usb3->lock, flags);
usb3_set_mode(usb3, host);
usb3_vbus_out(usb3, a_dev);
/* for A-Peripheral or forced B-device mode */
if ((!host && a_dev) ||
(usb3->workaround_for_vbus && usb3->forced_b_device))
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) & USB_OTG_IDMON);
}
static void usb3_check_id(struct renesas_usb3 *usb3)
{
usb3->extcon_host = usb3_is_a_device(usb3);
if (usb3->extcon_host && !usb3->forced_b_device)
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_USB_OTG_INT_STA);
usb3_write(usb3, USB_OTG_IDMON, USB3_USB_OTG_INT_ENA);
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_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_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;
break;
case USB_STA_SPEED_HS:
usb3->gadget.speed = USB_SPEED_HIGH;
break;
case USB_STA_SPEED_FS:
usb3->gadget.speed = USB_SPEED_FULL;
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_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 = -EAGAIN;
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 = usb3_get_request(usb3_ep);
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;
if (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 (ctrl->wValue >= 128)
return true; /* stall */
usb3_set_device_address(usb3, 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;
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) {
status = 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, &status, sizeof(status),
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 (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)
{
if (otg_int_sta & USB_OTG_IDMON)
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);
u32 otg_int_sta = usb3_read(usb3, USB3_USB_OTG_INT_STA);
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);
otg_int_sta &= usb3_read(usb3, USB3_USB_OTG_INT_ENA);
if (otg_int_sta) {
usb3_write(usb3, otg_int_sta, USB3_USB_OTG_INT_STA);
usb3_irq_otg_int(usb3, otg_int_sta);
}
}
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 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 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 (!strncmp(buf, "host", strlen("host")))
new_mode_is_host = true;
else if (!strncmp(buf, "peripheral", strlen("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;
if (!strncmp(buf, "1", 1))
usb3->forced_b_device = true;
else
usb3->forced_b_device = false;
/* Let this driver call usb3_connect() anyway */
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)
{
struct dentry *root, *file;
root = debugfs_create_dir(dev_name(dev), NULL);
if (IS_ERR_OR_NULL(root)) {
dev_info(dev, "%s: Can't create the root\n", __func__);
return;
}
file = debugfs_create_file("b_device", 0644, root, usb3,
&renesas_usb3_b_device_fops);
if (!file)
dev_info(dev, "%s: Can't create debugfs mode\n", __func__);
}
/*------- platform_driver ------------------------------------------------*/
static int renesas_usb3_remove(struct platform_device *pdev)
{
struct renesas_usb3 *usb3 = platform_get_drvdata(pdev);
device_remove_file(&pdev->dev, &dev_attr_role);
usb_del_gadget_udc(&usb3->gadget);
renesas_usb3_dma_free_prd(usb3, &pdev->dev);
__renesas_usb3_ep_free_request(usb3->ep0_req);
if (usb3->phy)
phy_put(usb3->phy);
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->num_usb3_eps = USB3_MAX_NUM_PIPES;
usb3->usb3_ep = devm_kzalloc(dev, sizeof(*usb3_ep) * usb3->num_usb3_eps,
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_HSFS_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 of_device_id usb3_of_match[] = {
{
.compatible = "renesas,r8a7795-usb3-peri",
.data = &renesas_usb3_priv_gen3,
},
{
.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 int renesas_usb3_probe(struct platform_device *pdev)
{
struct renesas_usb3 *usb3;
struct resource *res;
int 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) {
dev_err(&pdev->dev, "Failed to get IRQ: %d\n", irq);
return irq;
}
usb3 = devm_kzalloc(&pdev->dev, sizeof(*usb3), GFP_KERNEL);
if (!usb3)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
usb3->reg = devm_ioremap_resource(&pdev->dev, res);
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;
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;
ret = usb_add_gadget_udc(&pdev->dev, &usb3->gadget);
if (ret < 0)
goto err_add_udc;
ret = device_create_file(&pdev->dev, &dev_attr_role);
if (ret < 0)
goto err_dev_create;
/*
* This is an optional. So, if this driver cannot get a phy,
* this driver will not handle a phy anymore.
*/
usb3->phy = devm_phy_get(&pdev->dev, "usb");
if (IS_ERR(usb3->phy))
usb3->phy = 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" : "");
pm_runtime_enable(usb3_to_dev(usb3));
return 0;
err_dev_create:
usb_del_gadget_udc(&usb3->gadget);
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 = (char *)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");
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