| // 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/string.h> |
| #include <linux/sys_soc.h> |
| #include <linux/uaccess.h> |
| #include <linux/usb/ch9.h> |
| #include <linux/usb/gadget.h> |
| #include <linux/usb/of.h> |
| #include <linux/usb/role.h> |
| |
| /* register definitions */ |
| #define USB3_AXI_INT_STA 0x008 |
| #define USB3_AXI_INT_ENA 0x00c |
| #define USB3_DMA_INT_STA 0x010 |
| #define USB3_DMA_INT_ENA 0x014 |
| #define USB3_DMA_CH0_CON(n) (0x030 + ((n) - 1) * 0x10) /* n = 1 to 4 */ |
| #define USB3_DMA_CH0_PRD_ADR(n) (0x034 + ((n) - 1) * 0x10) /* n = 1 to 4 */ |
| #define USB3_USB_COM_CON 0x200 |
| #define USB3_USB20_CON 0x204 |
| #define USB3_USB30_CON 0x208 |
| #define USB3_USB_STA 0x210 |
| #define USB3_DRD_CON 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 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; |
| }; |
| |
| #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); |
| 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 (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_set_mode_by_role_sw(struct renesas_usb3 *usb3, bool host) |
| { |
| if (usb3->role_sw) { |
| usb3->role = host ? USB_ROLE_HOST : USB_ROLE_DEVICE; |
| schedule_work(&usb3->role_work); |
| } else { |
| usb3_set_mode(usb3, host); |
| } |
| } |
| |
| static void usb3_vbus_out(struct renesas_usb3 *usb3, bool enable) |
| { |
| if (enable) |
| usb3_set_bit(usb3, DRD_CON_VBOUT, USB3_DRD_CON); |
| 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); |
| if (!usb3->role_sw_by_connector || |
| usb3->connection_state != USB_ROLE_NONE) { |
| usb3_set_mode_by_role_sw(usb3, host); |
| usb3_vbus_out(usb3, a_dev); |
| } |
| /* for A-Peripheral or forced B-device mode */ |
| if ((!host && a_dev) || usb3->start_to_connect) |
| usb3_connect(usb3); |
| spin_unlock_irqrestore(&usb3->lock, flags); |
| } |
| |
| static bool usb3_is_a_device(struct renesas_usb3 *usb3) |
| { |
| return !(usb3_read(usb3, USB3_USB_OTG_STA) & USB_OTG_IDMON); |
| } |
| |
| static void usb3_check_id(struct renesas_usb3 *usb3) |
| { |
| usb3->extcon_host = usb3_is_a_device(usb3); |
| |
| if ((!usb3->role_sw_by_connector && usb3->extcon_host && |
| !usb3->forced_b_device) || usb3->connection_state == USB_ROLE_HOST) |
| usb3_mode_config(usb3, true, true); |
| else |
| usb3_mode_config(usb3, false, false); |
| |
| schedule_work(&usb3->extcon_work); |
| } |
| |
| static void renesas_usb3_init_controller(struct renesas_usb3 *usb3) |
| { |
| usb3_init_axi_bridge(usb3); |
| usb3_init_epc_registers(usb3); |
| usb3_set_bit(usb3, USB_COM_CON_PN_WDATAIF_NL | |
| USB_COM_CON_PN_RDATAIF_NL | USB_COM_CON_PN_LSTTR_PP, |
| USB3_USB_COM_CON); |
| usb3_write(usb3, USB_OTG_IDMON, USB3_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_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) |
| { |
| 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 enum usb_role renesas_usb3_role_switch_get(struct usb_role_switch *sw) |
| { |
| struct renesas_usb3 *usb3 = usb_role_switch_get_drvdata(sw); |
| enum usb_role cur_role; |
| |
| pm_runtime_get_sync(usb3_to_dev(usb3)); |
| cur_role = usb3_is_host(usb3) ? USB_ROLE_HOST : USB_ROLE_DEVICE; |
| pm_runtime_put(usb3_to_dev(usb3)); |
| |
| return cur_role; |
| } |
| |
| static void handle_ext_role_switch_states(struct device *dev, |
| enum usb_role role) |
| { |
| struct renesas_usb3 *usb3 = dev_get_drvdata(dev); |
| struct device *host = usb3->host_dev; |
| enum usb_role cur_role = renesas_usb3_role_switch_get(usb3->role_sw); |
| |
| switch (role) { |
| case USB_ROLE_NONE: |
| usb3->connection_state = USB_ROLE_NONE; |
| if (cur_role == USB_ROLE_HOST) |
| device_release_driver(host); |
| if (usb3->driver) |
| usb3_disconnect(usb3); |
| usb3_vbus_out(usb3, false); |
| break; |
| case USB_ROLE_DEVICE: |
| if (usb3->connection_state == USB_ROLE_NONE) { |
| usb3->connection_state = USB_ROLE_DEVICE; |
| usb3_set_mode(usb3, false); |
| if (usb3->driver) |
| usb3_connect(usb3); |
| } else if (cur_role == USB_ROLE_HOST) { |
| device_release_driver(host); |
| usb3_set_mode(usb3, false); |
| if (usb3->driver) |
| usb3_connect(usb3); |
| } |
| usb3_vbus_out(usb3, false); |
| break; |
| case USB_ROLE_HOST: |
| if (usb3->connection_state == USB_ROLE_NONE) { |
| if (usb3->driver) |
| usb3_disconnect(usb3); |
| |
| usb3->connection_state = USB_ROLE_HOST; |
| usb3_set_mode(usb3, true); |
| usb3_vbus_out(usb3, true); |
| if (device_attach(host) < 0) |
| dev_err(dev, "device_attach(host) failed\n"); |
| } else if (cur_role == USB_ROLE_DEVICE) { |
| usb3_disconnect(usb3); |
| /* Must set the mode before device_attach of the host */ |
| usb3_set_mode(usb3, true); |
| /* This device_attach() might sleep */ |
| if (device_attach(host) < 0) |
| dev_err(dev, "device_attach(host) failed\n"); |
| } |
| break; |
| default: |
| break; |
| } |
| } |
| |
| static void handle_role_switch_states(struct device *dev, |
| enum usb_role role) |
| { |
| struct renesas_usb3 *usb3 = dev_get_drvdata(dev); |
| struct device *host = usb3->host_dev; |
| enum usb_role cur_role = renesas_usb3_role_switch_get(usb3->role_sw); |
| |
| if (cur_role == USB_ROLE_HOST && role == USB_ROLE_DEVICE) { |
| device_release_driver(host); |
| usb3_set_mode(usb3, false); |
| } else if (cur_role == USB_ROLE_DEVICE && role == USB_ROLE_HOST) { |
| /* Must set the mode before device_attach of the host */ |
| usb3_set_mode(usb3, true); |
| /* This device_attach() might sleep */ |
| if (device_attach(host) < 0) |
| dev_err(dev, "device_attach(host) failed\n"); |
| } |
| } |
| |
| static int renesas_usb3_role_switch_set(struct usb_role_switch *sw, |
| enum usb_role role) |
| { |
| struct renesas_usb3 *usb3 = usb_role_switch_get_drvdata(sw); |
| |
| pm_runtime_get_sync(usb3_to_dev(usb3)); |
| |
| if (usb3->role_sw_by_connector) |
| handle_ext_role_switch_states(usb3_to_dev(usb3), role); |
| else |
| handle_role_switch_states(usb3_to_dev(usb3), role); |
| |
| pm_runtime_put(usb3_to_dev(usb3)); |
| |
| return 0; |
| } |
| |
| static ssize_t role_store(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct renesas_usb3 *usb3 = dev_get_drvdata(dev); |
| bool new_mode_is_host; |
| |
| if (!usb3->driver) |
| return -ENODEV; |
| |
| if (usb3->forced_b_device) |
| return -EBUSY; |
| |
| if (sysfs_streq(buf, "host")) |
| new_mode_is_host = true; |
| else if (sysfs_streq(buf, "peripheral")) |
| new_mode_is_host = false; |
| else |
| return -EINVAL; |
| |
| if (new_mode_is_host == usb3_is_host(usb3)) |
| return -EINVAL; |
| |
| usb3_mode_config(usb3, new_mode_is_host, usb3_is_a_device(usb3)); |
| |
| return count; |
| } |
| |
| static ssize_t role_show(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct renesas_usb3 *usb3 = dev_get_drvdata(dev); |
| |
| if (!usb3->driver) |
| return -ENODEV; |
| |
| return sprintf(buf, "%s\n", usb3_is_host(usb3) ? "host" : "peripheral"); |
| } |
| static DEVICE_ATTR_RW(role); |
| |
| static int renesas_usb3_b_device_show(struct seq_file *s, void *unused) |
| { |
| struct renesas_usb3 *usb3 = s->private; |
| |
| seq_printf(s, "%d\n", usb3->forced_b_device); |
| |
| return 0; |
| } |
| |
| static int renesas_usb3_b_device_open(struct inode *inode, struct file *file) |
| { |
| return single_open(file, renesas_usb3_b_device_show, inode->i_private); |
| } |
| |
| static ssize_t renesas_usb3_b_device_write(struct file *file, |
| const char __user *ubuf, |
| size_t count, loff_t *ppos) |
| { |
| struct seq_file *s = file->private_data; |
| struct renesas_usb3 *usb3 = s->private; |
| char buf[32]; |
| |
| if (!usb3->driver) |
| return -ENODEV; |
| |
| if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) |
| return -EFAULT; |
| |
| usb3->start_to_connect = false; |
| if (usb3->workaround_for_vbus && usb3->forced_b_device && |
| !strncmp(buf, "2", 1)) |
| usb3->start_to_connect = true; |
| else if (!strncmp(buf, "1", 1)) |
| usb3->forced_b_device = true; |
| else |
| usb3->forced_b_device = false; |
| |
| if (usb3->workaround_for_vbus) |
| usb3_disconnect(usb3); |
| |
| /* Let this driver call usb3_connect() if needed */ |
| usb3_check_id(usb3); |
| |
| return count; |
| } |
| |
| static const struct file_operations renesas_usb3_b_device_fops = { |
| .open = renesas_usb3_b_device_open, |
| .write = renesas_usb3_b_device_write, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = single_release, |
| }; |
| |
| static void renesas_usb3_debugfs_init(struct renesas_usb3 *usb3, |
| struct device *dev) |
| { |
| usb3->dentry = debugfs_create_dir(dev_name(dev), usb_debug_root); |
| |
| debugfs_create_file("b_device", 0644, usb3->dentry, usb3, |
| &renesas_usb3_b_device_fops); |
| } |
| |
| /*------- platform_driver ------------------------------------------------*/ |
| static int renesas_usb3_remove(struct platform_device *pdev) |
| { |
| struct renesas_usb3 *usb3 = platform_get_drvdata(pdev); |
| |
| debugfs_remove_recursive(usb3->dentry); |
| device_remove_file(&pdev->dev, &dev_attr_role); |
| |
| usb_role_switch_unregister(usb3->role_sw); |
| |
| usb_del_gadget_udc(&usb3->gadget); |
| renesas_usb3_dma_free_prd(usb3, &pdev->dev); |
| |
| __renesas_usb3_ep_free_request(usb3->ep0_req); |
| pm_runtime_disable(&pdev->dev); |
| |
| return 0; |
| } |
| |
| static int renesas_usb3_init_ep(struct renesas_usb3 *usb3, struct device *dev, |
| const struct renesas_usb3_priv *priv) |
| { |
| struct renesas_usb3_ep *usb3_ep; |
| int i; |
| |
| /* calculate num_usb3_eps from renesas_usb3_priv */ |
| usb3->num_usb3_eps = priv->ramsize_per_ramif * priv->num_ramif * 2 / |
| priv->ramsize_per_pipe + 1; |
| |
| if (usb3->num_usb3_eps > USB3_MAX_NUM_PIPES) |
| usb3->num_usb3_eps = USB3_MAX_NUM_PIPES; |
| |
| usb3->usb3_ep = devm_kcalloc(dev, |
| usb3->num_usb3_eps, sizeof(*usb3_ep), |
| GFP_KERNEL); |
| if (!usb3->usb3_ep) |
| return -ENOMEM; |
| |
| dev_dbg(dev, "%s: num_usb3_eps = %d\n", __func__, usb3->num_usb3_eps); |
| /* |
| * This driver prepares pipes as follows: |
| * - odd pipes = IN pipe |
| * - even pipes = OUT pipe (except pipe 0) |
| */ |
| usb3_for_each_ep(usb3_ep, usb3, i) { |
| snprintf(usb3_ep->ep_name, sizeof(usb3_ep->ep_name), "ep%d", i); |
| usb3_ep->usb3 = usb3; |
| usb3_ep->num = i; |
| usb3_ep->ep.name = usb3_ep->ep_name; |
| usb3_ep->ep.ops = &renesas_usb3_ep_ops; |
| INIT_LIST_HEAD(&usb3_ep->queue); |
| INIT_LIST_HEAD(&usb3_ep->ep.ep_list); |
| if (!i) { |
| /* for control pipe */ |
| usb3->gadget.ep0 = &usb3_ep->ep; |
| usb_ep_set_maxpacket_limit(&usb3_ep->ep, |
| USB3_EP0_SS_MAX_PACKET_SIZE); |
| usb3_ep->ep.caps.type_control = true; |
| usb3_ep->ep.caps.dir_in = true; |
| usb3_ep->ep.caps.dir_out = true; |
| continue; |
| } |
| |
| /* for bulk or interrupt pipe */ |
| usb_ep_set_maxpacket_limit(&usb3_ep->ep, ~0); |
| list_add_tail(&usb3_ep->ep.ep_list, &usb3->gadget.ep_list); |
| usb3_ep->ep.caps.type_bulk = true; |
| usb3_ep->ep.caps.type_int = true; |
| if (i & 1) |
| usb3_ep->ep.caps.dir_in = true; |
| else |
| usb3_ep->ep.caps.dir_out = true; |
| } |
| |
| return 0; |
| } |
| |
| static void renesas_usb3_init_ram(struct renesas_usb3 *usb3, struct device *dev, |
| const struct renesas_usb3_priv *priv) |
| { |
| struct renesas_usb3_ep *usb3_ep; |
| int i; |
| u32 ramif[2], basead[2]; /* index 0 = for IN pipes */ |
| u32 *cur_ramif, *cur_basead; |
| u32 val; |
| |
| memset(ramif, 0, sizeof(ramif)); |
| memset(basead, 0, sizeof(basead)); |
| |
| /* |
| * This driver prepares pipes as follows: |
| * - all pipes = the same size as "ramsize_per_pipe" |
| * Please refer to the "Method of Specifying RAM Mapping" |
| */ |
| usb3_for_each_ep(usb3_ep, usb3, i) { |
| if (!i) |
| continue; /* out of scope if ep num = 0 */ |
| if (usb3_ep->ep.caps.dir_in) { |
| cur_ramif = &ramif[0]; |
| cur_basead = &basead[0]; |
| } else { |
| cur_ramif = &ramif[1]; |
| cur_basead = &basead[1]; |
| } |
| |
| if (*cur_basead > priv->ramsize_per_ramif) |
| continue; /* out of memory for IN or OUT pipe */ |
| |
| /* calculate rammap_val */ |
| val = PN_RAMMAP_RAMIF(*cur_ramif); |
| val |= usb3_calc_ramarea(priv->ramsize_per_pipe); |
| val |= PN_RAMMAP_BASEAD(*cur_basead); |
| usb3_ep->rammap_val = val; |
| |
| dev_dbg(dev, "ep%2d: val = %08x, ramif = %d, base = %x\n", |
| i, val, *cur_ramif, *cur_basead); |
| |
| /* update current ramif */ |
| if (*cur_ramif + 1 == priv->num_ramif) { |
| *cur_ramif = 0; |
| *cur_basead += priv->ramsize_per_pipe; |
| } else { |
| (*cur_ramif)++; |
| } |
| } |
| } |
| |
| static const struct renesas_usb3_priv renesas_usb3_priv_r8a7795_es1 = { |
| .ramsize_per_ramif = SZ_16K, |
| .num_ramif = 2, |
| .ramsize_per_pipe = SZ_4K, |
| .workaround_for_vbus = true, |
| }; |
| |
| static const struct renesas_usb3_priv renesas_usb3_priv_gen3 = { |
| .ramsize_per_ramif = SZ_16K, |
| .num_ramif = 4, |
| .ramsize_per_pipe = SZ_4K, |
| }; |
| |
| static const struct renesas_usb3_priv renesas_usb3_priv_r8a77990 = { |
| .ramsize_per_ramif = SZ_16K, |
| .num_ramif = 4, |
| .ramsize_per_pipe = SZ_4K, |
| .workaround_for_vbus = true, |
| }; |
| |
| static const struct 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,rcar-gen3-usb3-peri", |
| .data = &renesas_usb3_priv_gen3, |
| }, |
| { }, |
| }; |
| MODULE_DEVICE_TABLE(of, usb3_of_match); |
| |
| static const struct soc_device_attribute renesas_usb3_quirks_match[] = { |
| { |
| .soc_id = "r8a7795", .revision = "ES1.*", |
| .data = &renesas_usb3_priv_r8a7795_es1, |
| }, |
| { /* sentinel */ } |
| }; |
| |
| static const unsigned int renesas_usb3_cable[] = { |
| EXTCON_USB, |
| EXTCON_USB_HOST, |
| EXTCON_NONE, |
| }; |
| |
| static struct usb_role_switch_desc renesas_usb3_role_switch_desc = { |
| .set = renesas_usb3_role_switch_set, |
| .get = renesas_usb3_role_switch_get, |
| .allow_userspace_control = true, |
| }; |
| |
| static int renesas_usb3_probe(struct platform_device *pdev) |
| { |
| struct renesas_usb3 *usb3; |
| int irq, ret; |
| const struct renesas_usb3_priv *priv; |
| const struct soc_device_attribute *attr; |
| |
| attr = soc_device_match(renesas_usb3_quirks_match); |
| if (attr) |
| priv = attr->data; |
| else |
| priv = of_device_get_match_data(&pdev->dev); |
| |
| irq = platform_get_irq(pdev, 0); |
| if (irq < 0) |
| return irq; |
| |
| usb3 = devm_kzalloc(&pdev->dev, sizeof(*usb3), GFP_KERNEL); |
| if (!usb3) |
| return -ENOMEM; |
| |
| 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; |
| |
| 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; |
| } |
| |
| pm_runtime_enable(&pdev->dev); |
| 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; |
| |
| 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_add_udc: |
| renesas_usb3_dma_free_prd(usb3, &pdev->dev); |
| |
| err_alloc_prd: |
| __renesas_usb3_ep_free_request(usb3->ep0_req); |
| |
| return ret; |
| } |
| |
| #ifdef CONFIG_PM_SLEEP |
| static int renesas_usb3_suspend(struct device *dev) |
| { |
| struct renesas_usb3 *usb3 = dev_get_drvdata(dev); |
| |
| /* Not started */ |
| if (!usb3->driver) |
| return 0; |
| |
| renesas_usb3_stop_controller(usb3); |
| if (usb3->phy) |
| phy_exit(usb3->phy); |
| pm_runtime_put(dev); |
| |
| return 0; |
| } |
| |
| static int renesas_usb3_resume(struct device *dev) |
| { |
| struct renesas_usb3 *usb3 = dev_get_drvdata(dev); |
| |
| /* Not started */ |
| if (!usb3->driver) |
| return 0; |
| |
| if (usb3->phy) |
| phy_init(usb3->phy); |
| pm_runtime_get_sync(dev); |
| renesas_usb3_init_controller(usb3); |
| |
| return 0; |
| } |
| #endif |
| |
| static SIMPLE_DEV_PM_OPS(renesas_usb3_pm_ops, renesas_usb3_suspend, |
| renesas_usb3_resume); |
| |
| static struct platform_driver renesas_usb3_driver = { |
| .probe = renesas_usb3_probe, |
| .remove = renesas_usb3_remove, |
| .driver = { |
| .name = udc_name, |
| .pm = &renesas_usb3_pm_ops, |
| .of_match_table = of_match_ptr(usb3_of_match), |
| }, |
| }; |
| module_platform_driver(renesas_usb3_driver); |
| |
| MODULE_DESCRIPTION("Renesas USB3.0 Peripheral driver"); |
| MODULE_LICENSE("GPL v2"); |
| MODULE_AUTHOR("Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>"); |
| MODULE_ALIAS("platform:renesas_usb3"); |