| /* |
| * USB Gadget driver for LPC32xx |
| * |
| * Authors: |
| * Kevin Wells <kevin.wells@nxp.com> |
| * Mike James |
| * Roland Stigge <stigge@antcom.de> |
| * |
| * Copyright (C) 2006 Philips Semiconductors |
| * Copyright (C) 2009 NXP Semiconductors |
| * Copyright (C) 2012 Roland Stigge |
| * |
| * Note: This driver is based on original work done by Mike James for |
| * the LPC3180. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/platform_device.h> |
| #include <linux/delay.h> |
| #include <linux/ioport.h> |
| #include <linux/slab.h> |
| #include <linux/errno.h> |
| #include <linux/init.h> |
| #include <linux/list.h> |
| #include <linux/interrupt.h> |
| #include <linux/proc_fs.h> |
| #include <linux/clk.h> |
| #include <linux/usb/ch9.h> |
| #include <linux/usb/gadget.h> |
| #include <linux/i2c.h> |
| #include <linux/kthread.h> |
| #include <linux/freezer.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/dmapool.h> |
| #include <linux/workqueue.h> |
| #include <linux/of.h> |
| #include <linux/usb/isp1301.h> |
| |
| #include <asm/byteorder.h> |
| #include <mach/hardware.h> |
| #include <linux/io.h> |
| #include <asm/irq.h> |
| |
| #include <mach/platform.h> |
| #include <mach/irqs.h> |
| #include <mach/board.h> |
| #ifdef CONFIG_USB_GADGET_DEBUG_FILES |
| #include <linux/debugfs.h> |
| #include <linux/seq_file.h> |
| #endif |
| |
| /* |
| * USB device configuration structure |
| */ |
| typedef void (*usc_chg_event)(int); |
| struct lpc32xx_usbd_cfg { |
| int vbus_drv_pol; /* 0=active low drive for VBUS via ISP1301 */ |
| usc_chg_event conn_chgb; /* Connection change event (optional) */ |
| usc_chg_event susp_chgb; /* Suspend/resume event (optional) */ |
| usc_chg_event rmwk_chgb; /* Enable/disable remote wakeup */ |
| }; |
| |
| /* |
| * controller driver data structures |
| */ |
| |
| /* 16 endpoints (not to be confused with 32 hardware endpoints) */ |
| #define NUM_ENDPOINTS 16 |
| |
| /* |
| * IRQ indices make reading the code a little easier |
| */ |
| #define IRQ_USB_LP 0 |
| #define IRQ_USB_HP 1 |
| #define IRQ_USB_DEVDMA 2 |
| #define IRQ_USB_ATX 3 |
| |
| #define EP_OUT 0 /* RX (from host) */ |
| #define EP_IN 1 /* TX (to host) */ |
| |
| /* Returns the interrupt mask for the selected hardware endpoint */ |
| #define EP_MASK_SEL(ep, dir) (1 << (((ep) * 2) + dir)) |
| |
| #define EP_INT_TYPE 0 |
| #define EP_ISO_TYPE 1 |
| #define EP_BLK_TYPE 2 |
| #define EP_CTL_TYPE 3 |
| |
| /* EP0 states */ |
| #define WAIT_FOR_SETUP 0 /* Wait for setup packet */ |
| #define DATA_IN 1 /* Expect dev->host transfer */ |
| #define DATA_OUT 2 /* Expect host->dev transfer */ |
| |
| /* DD (DMA Descriptor) structure, requires word alignment, this is already |
| * defined in the LPC32XX USB device header file, but this version is slightly |
| * modified to tag some work data with each DMA descriptor. */ |
| struct lpc32xx_usbd_dd_gad { |
| u32 dd_next_phy; |
| u32 dd_setup; |
| u32 dd_buffer_addr; |
| u32 dd_status; |
| u32 dd_iso_ps_mem_addr; |
| u32 this_dma; |
| u32 iso_status[6]; /* 5 spare */ |
| u32 dd_next_v; |
| }; |
| |
| /* |
| * Logical endpoint structure |
| */ |
| struct lpc32xx_ep { |
| struct usb_ep ep; |
| struct list_head queue; |
| struct lpc32xx_udc *udc; |
| |
| u32 hwep_num_base; /* Physical hardware EP */ |
| u32 hwep_num; /* Maps to hardware endpoint */ |
| u32 maxpacket; |
| u32 lep; |
| |
| bool is_in; |
| bool req_pending; |
| u32 eptype; |
| |
| u32 totalints; |
| |
| bool wedge; |
| }; |
| |
| /* |
| * Common UDC structure |
| */ |
| struct lpc32xx_udc { |
| struct usb_gadget gadget; |
| struct usb_gadget_driver *driver; |
| struct platform_device *pdev; |
| struct device *dev; |
| struct dentry *pde; |
| spinlock_t lock; |
| struct i2c_client *isp1301_i2c_client; |
| |
| /* Board and device specific */ |
| struct lpc32xx_usbd_cfg *board; |
| u32 io_p_start; |
| u32 io_p_size; |
| void __iomem *udp_baseaddr; |
| int udp_irq[4]; |
| struct clk *usb_pll_clk; |
| struct clk *usb_slv_clk; |
| struct clk *usb_otg_clk; |
| |
| /* DMA support */ |
| u32 *udca_v_base; |
| u32 udca_p_base; |
| struct dma_pool *dd_cache; |
| |
| /* Common EP and control data */ |
| u32 enabled_devints; |
| u32 enabled_hwepints; |
| u32 dev_status; |
| u32 realized_eps; |
| |
| /* VBUS detection, pullup, and power flags */ |
| u8 vbus; |
| u8 last_vbus; |
| int pullup; |
| int poweron; |
| |
| /* Work queues related to I2C support */ |
| struct work_struct pullup_job; |
| struct work_struct vbus_job; |
| struct work_struct power_job; |
| |
| /* USB device peripheral - various */ |
| struct lpc32xx_ep ep[NUM_ENDPOINTS]; |
| bool enabled; |
| bool clocked; |
| bool suspended; |
| bool selfpowered; |
| int ep0state; |
| atomic_t enabled_ep_cnt; |
| wait_queue_head_t ep_disable_wait_queue; |
| }; |
| |
| /* |
| * Endpoint request |
| */ |
| struct lpc32xx_request { |
| struct usb_request req; |
| struct list_head queue; |
| struct lpc32xx_usbd_dd_gad *dd_desc_ptr; |
| bool mapped; |
| bool send_zlp; |
| }; |
| |
| static inline struct lpc32xx_udc *to_udc(struct usb_gadget *g) |
| { |
| return container_of(g, struct lpc32xx_udc, gadget); |
| } |
| |
| #define ep_dbg(epp, fmt, arg...) \ |
| dev_dbg(epp->udc->dev, "%s: " fmt, __func__, ## arg) |
| #define ep_err(epp, fmt, arg...) \ |
| dev_err(epp->udc->dev, "%s: " fmt, __func__, ## arg) |
| #define ep_info(epp, fmt, arg...) \ |
| dev_info(epp->udc->dev, "%s: " fmt, __func__, ## arg) |
| #define ep_warn(epp, fmt, arg...) \ |
| dev_warn(epp->udc->dev, "%s:" fmt, __func__, ## arg) |
| |
| #define UDCA_BUFF_SIZE (128) |
| |
| /* TODO: When the clock framework is introduced in LPC32xx, IO_ADDRESS will |
| * be replaced with an inremap()ed pointer |
| * */ |
| #define USB_CTRL IO_ADDRESS(LPC32XX_CLK_PM_BASE + 0x64) |
| |
| /* USB_CTRL bit defines */ |
| #define USB_SLAVE_HCLK_EN (1 << 24) |
| #define USB_HOST_NEED_CLK_EN (1 << 21) |
| #define USB_DEV_NEED_CLK_EN (1 << 22) |
| |
| /********************************************************************** |
| * USB device controller register offsets |
| **********************************************************************/ |
| |
| #define USBD_DEVINTST(x) ((x) + 0x200) |
| #define USBD_DEVINTEN(x) ((x) + 0x204) |
| #define USBD_DEVINTCLR(x) ((x) + 0x208) |
| #define USBD_DEVINTSET(x) ((x) + 0x20C) |
| #define USBD_CMDCODE(x) ((x) + 0x210) |
| #define USBD_CMDDATA(x) ((x) + 0x214) |
| #define USBD_RXDATA(x) ((x) + 0x218) |
| #define USBD_TXDATA(x) ((x) + 0x21C) |
| #define USBD_RXPLEN(x) ((x) + 0x220) |
| #define USBD_TXPLEN(x) ((x) + 0x224) |
| #define USBD_CTRL(x) ((x) + 0x228) |
| #define USBD_DEVINTPRI(x) ((x) + 0x22C) |
| #define USBD_EPINTST(x) ((x) + 0x230) |
| #define USBD_EPINTEN(x) ((x) + 0x234) |
| #define USBD_EPINTCLR(x) ((x) + 0x238) |
| #define USBD_EPINTSET(x) ((x) + 0x23C) |
| #define USBD_EPINTPRI(x) ((x) + 0x240) |
| #define USBD_REEP(x) ((x) + 0x244) |
| #define USBD_EPIND(x) ((x) + 0x248) |
| #define USBD_EPMAXPSIZE(x) ((x) + 0x24C) |
| /* DMA support registers only below */ |
| /* Set, clear, or get enabled state of the DMA request status. If |
| * enabled, an IN or OUT token will start a DMA transfer for the EP */ |
| #define USBD_DMARST(x) ((x) + 0x250) |
| #define USBD_DMARCLR(x) ((x) + 0x254) |
| #define USBD_DMARSET(x) ((x) + 0x258) |
| /* DMA UDCA head pointer */ |
| #define USBD_UDCAH(x) ((x) + 0x280) |
| /* EP DMA status, enable, and disable. This is used to specifically |
| * enabled or disable DMA for a specific EP */ |
| #define USBD_EPDMAST(x) ((x) + 0x284) |
| #define USBD_EPDMAEN(x) ((x) + 0x288) |
| #define USBD_EPDMADIS(x) ((x) + 0x28C) |
| /* DMA master interrupts enable and pending interrupts */ |
| #define USBD_DMAINTST(x) ((x) + 0x290) |
| #define USBD_DMAINTEN(x) ((x) + 0x294) |
| /* DMA end of transfer interrupt enable, disable, status */ |
| #define USBD_EOTINTST(x) ((x) + 0x2A0) |
| #define USBD_EOTINTCLR(x) ((x) + 0x2A4) |
| #define USBD_EOTINTSET(x) ((x) + 0x2A8) |
| /* New DD request interrupt enable, disable, status */ |
| #define USBD_NDDRTINTST(x) ((x) + 0x2AC) |
| #define USBD_NDDRTINTCLR(x) ((x) + 0x2B0) |
| #define USBD_NDDRTINTSET(x) ((x) + 0x2B4) |
| /* DMA error interrupt enable, disable, status */ |
| #define USBD_SYSERRTINTST(x) ((x) + 0x2B8) |
| #define USBD_SYSERRTINTCLR(x) ((x) + 0x2BC) |
| #define USBD_SYSERRTINTSET(x) ((x) + 0x2C0) |
| |
| /********************************************************************** |
| * USBD_DEVINTST/USBD_DEVINTEN/USBD_DEVINTCLR/USBD_DEVINTSET/ |
| * USBD_DEVINTPRI register definitions |
| **********************************************************************/ |
| #define USBD_ERR_INT (1 << 9) |
| #define USBD_EP_RLZED (1 << 8) |
| #define USBD_TXENDPKT (1 << 7) |
| #define USBD_RXENDPKT (1 << 6) |
| #define USBD_CDFULL (1 << 5) |
| #define USBD_CCEMPTY (1 << 4) |
| #define USBD_DEV_STAT (1 << 3) |
| #define USBD_EP_SLOW (1 << 2) |
| #define USBD_EP_FAST (1 << 1) |
| #define USBD_FRAME (1 << 0) |
| |
| /********************************************************************** |
| * USBD_EPINTST/USBD_EPINTEN/USBD_EPINTCLR/USBD_EPINTSET/ |
| * USBD_EPINTPRI register definitions |
| **********************************************************************/ |
| /* End point selection macro (RX) */ |
| #define USBD_RX_EP_SEL(e) (1 << ((e) << 1)) |
| |
| /* End point selection macro (TX) */ |
| #define USBD_TX_EP_SEL(e) (1 << (((e) << 1) + 1)) |
| |
| /********************************************************************** |
| * USBD_REEP/USBD_DMARST/USBD_DMARCLR/USBD_DMARSET/USBD_EPDMAST/ |
| * USBD_EPDMAEN/USBD_EPDMADIS/ |
| * USBD_NDDRTINTST/USBD_NDDRTINTCLR/USBD_NDDRTINTSET/ |
| * USBD_EOTINTST/USBD_EOTINTCLR/USBD_EOTINTSET/ |
| * USBD_SYSERRTINTST/USBD_SYSERRTINTCLR/USBD_SYSERRTINTSET |
| * register definitions |
| **********************************************************************/ |
| /* Endpoint selection macro */ |
| #define USBD_EP_SEL(e) (1 << (e)) |
| |
| /********************************************************************** |
| * SBD_DMAINTST/USBD_DMAINTEN |
| **********************************************************************/ |
| #define USBD_SYS_ERR_INT (1 << 2) |
| #define USBD_NEW_DD_INT (1 << 1) |
| #define USBD_EOT_INT (1 << 0) |
| |
| /********************************************************************** |
| * USBD_RXPLEN register definitions |
| **********************************************************************/ |
| #define USBD_PKT_RDY (1 << 11) |
| #define USBD_DV (1 << 10) |
| #define USBD_PK_LEN_MASK 0x3FF |
| |
| /********************************************************************** |
| * USBD_CTRL register definitions |
| **********************************************************************/ |
| #define USBD_LOG_ENDPOINT(e) ((e) << 2) |
| #define USBD_WR_EN (1 << 1) |
| #define USBD_RD_EN (1 << 0) |
| |
| /********************************************************************** |
| * USBD_CMDCODE register definitions |
| **********************************************************************/ |
| #define USBD_CMD_CODE(c) ((c) << 16) |
| #define USBD_CMD_PHASE(p) ((p) << 8) |
| |
| /********************************************************************** |
| * USBD_DMARST/USBD_DMARCLR/USBD_DMARSET register definitions |
| **********************************************************************/ |
| #define USBD_DMAEP(e) (1 << (e)) |
| |
| /* DD (DMA Descriptor) structure, requires word alignment */ |
| struct lpc32xx_usbd_dd { |
| u32 *dd_next; |
| u32 dd_setup; |
| u32 dd_buffer_addr; |
| u32 dd_status; |
| u32 dd_iso_ps_mem_addr; |
| }; |
| |
| /* dd_setup bit defines */ |
| #define DD_SETUP_ATLE_DMA_MODE 0x01 |
| #define DD_SETUP_NEXT_DD_VALID 0x04 |
| #define DD_SETUP_ISO_EP 0x10 |
| #define DD_SETUP_PACKETLEN(n) (((n) & 0x7FF) << 5) |
| #define DD_SETUP_DMALENBYTES(n) (((n) & 0xFFFF) << 16) |
| |
| /* dd_status bit defines */ |
| #define DD_STATUS_DD_RETIRED 0x01 |
| #define DD_STATUS_STS_MASK 0x1E |
| #define DD_STATUS_STS_NS 0x00 /* Not serviced */ |
| #define DD_STATUS_STS_BS 0x02 /* Being serviced */ |
| #define DD_STATUS_STS_NC 0x04 /* Normal completion */ |
| #define DD_STATUS_STS_DUR 0x06 /* Data underrun (short packet) */ |
| #define DD_STATUS_STS_DOR 0x08 /* Data overrun */ |
| #define DD_STATUS_STS_SE 0x12 /* System error */ |
| #define DD_STATUS_PKT_VAL 0x20 /* Packet valid */ |
| #define DD_STATUS_LSB_EX 0x40 /* LS byte extracted (ATLE) */ |
| #define DD_STATUS_MSB_EX 0x80 /* MS byte extracted (ATLE) */ |
| #define DD_STATUS_MLEN(n) (((n) >> 8) & 0x3F) |
| #define DD_STATUS_CURDMACNT(n) (((n) >> 16) & 0xFFFF) |
| |
| /* |
| * |
| * Protocol engine bits below |
| * |
| */ |
| /* Device Interrupt Bit Definitions */ |
| #define FRAME_INT 0x00000001 |
| #define EP_FAST_INT 0x00000002 |
| #define EP_SLOW_INT 0x00000004 |
| #define DEV_STAT_INT 0x00000008 |
| #define CCEMTY_INT 0x00000010 |
| #define CDFULL_INT 0x00000020 |
| #define RxENDPKT_INT 0x00000040 |
| #define TxENDPKT_INT 0x00000080 |
| #define EP_RLZED_INT 0x00000100 |
| #define ERR_INT 0x00000200 |
| |
| /* Rx & Tx Packet Length Definitions */ |
| #define PKT_LNGTH_MASK 0x000003FF |
| #define PKT_DV 0x00000400 |
| #define PKT_RDY 0x00000800 |
| |
| /* USB Control Definitions */ |
| #define CTRL_RD_EN 0x00000001 |
| #define CTRL_WR_EN 0x00000002 |
| |
| /* Command Codes */ |
| #define CMD_SET_ADDR 0x00D00500 |
| #define CMD_CFG_DEV 0x00D80500 |
| #define CMD_SET_MODE 0x00F30500 |
| #define CMD_RD_FRAME 0x00F50500 |
| #define DAT_RD_FRAME 0x00F50200 |
| #define CMD_RD_TEST 0x00FD0500 |
| #define DAT_RD_TEST 0x00FD0200 |
| #define CMD_SET_DEV_STAT 0x00FE0500 |
| #define CMD_GET_DEV_STAT 0x00FE0500 |
| #define DAT_GET_DEV_STAT 0x00FE0200 |
| #define CMD_GET_ERR_CODE 0x00FF0500 |
| #define DAT_GET_ERR_CODE 0x00FF0200 |
| #define CMD_RD_ERR_STAT 0x00FB0500 |
| #define DAT_RD_ERR_STAT 0x00FB0200 |
| #define DAT_WR_BYTE(x) (0x00000100 | ((x) << 16)) |
| #define CMD_SEL_EP(x) (0x00000500 | ((x) << 16)) |
| #define DAT_SEL_EP(x) (0x00000200 | ((x) << 16)) |
| #define CMD_SEL_EP_CLRI(x) (0x00400500 | ((x) << 16)) |
| #define DAT_SEL_EP_CLRI(x) (0x00400200 | ((x) << 16)) |
| #define CMD_SET_EP_STAT(x) (0x00400500 | ((x) << 16)) |
| #define CMD_CLR_BUF 0x00F20500 |
| #define DAT_CLR_BUF 0x00F20200 |
| #define CMD_VALID_BUF 0x00FA0500 |
| |
| /* Device Address Register Definitions */ |
| #define DEV_ADDR_MASK 0x7F |
| #define DEV_EN 0x80 |
| |
| /* Device Configure Register Definitions */ |
| #define CONF_DVICE 0x01 |
| |
| /* Device Mode Register Definitions */ |
| #define AP_CLK 0x01 |
| #define INAK_CI 0x02 |
| #define INAK_CO 0x04 |
| #define INAK_II 0x08 |
| #define INAK_IO 0x10 |
| #define INAK_BI 0x20 |
| #define INAK_BO 0x40 |
| |
| /* Device Status Register Definitions */ |
| #define DEV_CON 0x01 |
| #define DEV_CON_CH 0x02 |
| #define DEV_SUS 0x04 |
| #define DEV_SUS_CH 0x08 |
| #define DEV_RST 0x10 |
| |
| /* Error Code Register Definitions */ |
| #define ERR_EC_MASK 0x0F |
| #define ERR_EA 0x10 |
| |
| /* Error Status Register Definitions */ |
| #define ERR_PID 0x01 |
| #define ERR_UEPKT 0x02 |
| #define ERR_DCRC 0x04 |
| #define ERR_TIMOUT 0x08 |
| #define ERR_EOP 0x10 |
| #define ERR_B_OVRN 0x20 |
| #define ERR_BTSTF 0x40 |
| #define ERR_TGL 0x80 |
| |
| /* Endpoint Select Register Definitions */ |
| #define EP_SEL_F 0x01 |
| #define EP_SEL_ST 0x02 |
| #define EP_SEL_STP 0x04 |
| #define EP_SEL_PO 0x08 |
| #define EP_SEL_EPN 0x10 |
| #define EP_SEL_B_1_FULL 0x20 |
| #define EP_SEL_B_2_FULL 0x40 |
| |
| /* Endpoint Status Register Definitions */ |
| #define EP_STAT_ST 0x01 |
| #define EP_STAT_DA 0x20 |
| #define EP_STAT_RF_MO 0x40 |
| #define EP_STAT_CND_ST 0x80 |
| |
| /* Clear Buffer Register Definitions */ |
| #define CLR_BUF_PO 0x01 |
| |
| /* DMA Interrupt Bit Definitions */ |
| #define EOT_INT 0x01 |
| #define NDD_REQ_INT 0x02 |
| #define SYS_ERR_INT 0x04 |
| |
| #define DRIVER_VERSION "1.03" |
| static const char driver_name[] = "lpc32xx_udc"; |
| |
| /* |
| * |
| * proc interface support |
| * |
| */ |
| #ifdef CONFIG_USB_GADGET_DEBUG_FILES |
| static char *epnames[] = {"INT", "ISO", "BULK", "CTRL"}; |
| static const char debug_filename[] = "driver/udc"; |
| |
| static void proc_ep_show(struct seq_file *s, struct lpc32xx_ep *ep) |
| { |
| struct lpc32xx_request *req; |
| |
| seq_printf(s, "\n"); |
| seq_printf(s, "%12s, maxpacket %4d %3s", |
| ep->ep.name, ep->ep.maxpacket, |
| ep->is_in ? "in" : "out"); |
| seq_printf(s, " type %4s", epnames[ep->eptype]); |
| seq_printf(s, " ints: %12d", ep->totalints); |
| |
| if (list_empty(&ep->queue)) |
| seq_printf(s, "\t(queue empty)\n"); |
| else { |
| list_for_each_entry(req, &ep->queue, queue) { |
| u32 length = req->req.actual; |
| |
| seq_printf(s, "\treq %p len %d/%d buf %p\n", |
| &req->req, length, |
| req->req.length, req->req.buf); |
| } |
| } |
| } |
| |
| static int proc_udc_show(struct seq_file *s, void *unused) |
| { |
| struct lpc32xx_udc *udc = s->private; |
| struct lpc32xx_ep *ep; |
| unsigned long flags; |
| |
| seq_printf(s, "%s: version %s\n", driver_name, DRIVER_VERSION); |
| |
| spin_lock_irqsave(&udc->lock, flags); |
| |
| seq_printf(s, "vbus %s, pullup %s, %s powered%s, gadget %s\n\n", |
| udc->vbus ? "present" : "off", |
| udc->enabled ? (udc->vbus ? "active" : "enabled") : |
| "disabled", |
| udc->selfpowered ? "self" : "VBUS", |
| udc->suspended ? ", suspended" : "", |
| udc->driver ? udc->driver->driver.name : "(none)"); |
| |
| if (udc->enabled && udc->vbus) { |
| proc_ep_show(s, &udc->ep[0]); |
| list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) |
| proc_ep_show(s, ep); |
| } |
| |
| spin_unlock_irqrestore(&udc->lock, flags); |
| |
| return 0; |
| } |
| |
| static int proc_udc_open(struct inode *inode, struct file *file) |
| { |
| return single_open(file, proc_udc_show, PDE_DATA(inode)); |
| } |
| |
| static const struct file_operations proc_ops = { |
| .owner = THIS_MODULE, |
| .open = proc_udc_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = single_release, |
| }; |
| |
| static void create_debug_file(struct lpc32xx_udc *udc) |
| { |
| udc->pde = debugfs_create_file(debug_filename, 0, NULL, udc, &proc_ops); |
| } |
| |
| static void remove_debug_file(struct lpc32xx_udc *udc) |
| { |
| if (udc->pde) |
| debugfs_remove(udc->pde); |
| } |
| |
| #else |
| static inline void create_debug_file(struct lpc32xx_udc *udc) {} |
| static inline void remove_debug_file(struct lpc32xx_udc *udc) {} |
| #endif |
| |
| /* Primary initialization sequence for the ISP1301 transceiver */ |
| static void isp1301_udc_configure(struct lpc32xx_udc *udc) |
| { |
| /* LPC32XX only supports DAT_SE0 USB mode */ |
| /* This sequence is important */ |
| |
| /* Disable transparent UART mode first */ |
| i2c_smbus_write_byte_data(udc->isp1301_i2c_client, |
| (ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), |
| MC1_UART_EN); |
| |
| /* Set full speed and SE0 mode */ |
| i2c_smbus_write_byte_data(udc->isp1301_i2c_client, |
| (ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), ~0); |
| i2c_smbus_write_byte_data(udc->isp1301_i2c_client, |
| ISP1301_I2C_MODE_CONTROL_1, (MC1_SPEED_REG | MC1_DAT_SE0)); |
| |
| /* |
| * The PSW_OE enable bit state is reversed in the ISP1301 User's Guide |
| */ |
| i2c_smbus_write_byte_data(udc->isp1301_i2c_client, |
| (ISP1301_I2C_MODE_CONTROL_2 | ISP1301_I2C_REG_CLEAR_ADDR), ~0); |
| i2c_smbus_write_byte_data(udc->isp1301_i2c_client, |
| ISP1301_I2C_MODE_CONTROL_2, (MC2_BI_DI | MC2_SPD_SUSP_CTRL)); |
| |
| /* Driver VBUS_DRV high or low depending on board setup */ |
| if (udc->board->vbus_drv_pol != 0) |
| i2c_smbus_write_byte_data(udc->isp1301_i2c_client, |
| ISP1301_I2C_OTG_CONTROL_1, OTG1_VBUS_DRV); |
| else |
| i2c_smbus_write_byte_data(udc->isp1301_i2c_client, |
| ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR, |
| OTG1_VBUS_DRV); |
| |
| /* Bi-directional mode with suspend control |
| * Enable both pulldowns for now - the pullup will be enable when VBUS |
| * is detected */ |
| i2c_smbus_write_byte_data(udc->isp1301_i2c_client, |
| (ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), ~0); |
| i2c_smbus_write_byte_data(udc->isp1301_i2c_client, |
| ISP1301_I2C_OTG_CONTROL_1, |
| (0 | OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN)); |
| |
| /* Discharge VBUS (just in case) */ |
| i2c_smbus_write_byte_data(udc->isp1301_i2c_client, |
| ISP1301_I2C_OTG_CONTROL_1, OTG1_VBUS_DISCHRG); |
| msleep(1); |
| i2c_smbus_write_byte_data(udc->isp1301_i2c_client, |
| (ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), |
| OTG1_VBUS_DISCHRG); |
| |
| /* Clear and enable VBUS high edge interrupt */ |
| i2c_smbus_write_byte_data(udc->isp1301_i2c_client, |
| ISP1301_I2C_INTERRUPT_LATCH | ISP1301_I2C_REG_CLEAR_ADDR, ~0); |
| i2c_smbus_write_byte_data(udc->isp1301_i2c_client, |
| ISP1301_I2C_INTERRUPT_FALLING | ISP1301_I2C_REG_CLEAR_ADDR, ~0); |
| i2c_smbus_write_byte_data(udc->isp1301_i2c_client, |
| ISP1301_I2C_INTERRUPT_FALLING, INT_VBUS_VLD); |
| i2c_smbus_write_byte_data(udc->isp1301_i2c_client, |
| ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR, ~0); |
| i2c_smbus_write_byte_data(udc->isp1301_i2c_client, |
| ISP1301_I2C_INTERRUPT_RISING, INT_VBUS_VLD); |
| |
| /* Enable usb_need_clk clock after transceiver is initialized */ |
| writel((readl(USB_CTRL) | USB_DEV_NEED_CLK_EN), USB_CTRL); |
| |
| dev_info(udc->dev, "ISP1301 Vendor ID : 0x%04x\n", |
| i2c_smbus_read_word_data(udc->isp1301_i2c_client, 0x00)); |
| dev_info(udc->dev, "ISP1301 Product ID : 0x%04x\n", |
| i2c_smbus_read_word_data(udc->isp1301_i2c_client, 0x02)); |
| dev_info(udc->dev, "ISP1301 Version ID : 0x%04x\n", |
| i2c_smbus_read_word_data(udc->isp1301_i2c_client, 0x14)); |
| } |
| |
| /* Enables or disables the USB device pullup via the ISP1301 transceiver */ |
| static void isp1301_pullup_set(struct lpc32xx_udc *udc) |
| { |
| if (udc->pullup) |
| /* Enable pullup for bus signalling */ |
| i2c_smbus_write_byte_data(udc->isp1301_i2c_client, |
| ISP1301_I2C_OTG_CONTROL_1, OTG1_DP_PULLUP); |
| else |
| /* Enable pullup for bus signalling */ |
| i2c_smbus_write_byte_data(udc->isp1301_i2c_client, |
| ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR, |
| OTG1_DP_PULLUP); |
| } |
| |
| static void pullup_work(struct work_struct *work) |
| { |
| struct lpc32xx_udc *udc = |
| container_of(work, struct lpc32xx_udc, pullup_job); |
| |
| isp1301_pullup_set(udc); |
| } |
| |
| static void isp1301_pullup_enable(struct lpc32xx_udc *udc, int en_pullup, |
| int block) |
| { |
| if (en_pullup == udc->pullup) |
| return; |
| |
| udc->pullup = en_pullup; |
| if (block) |
| isp1301_pullup_set(udc); |
| else |
| /* defer slow i2c pull up setting */ |
| schedule_work(&udc->pullup_job); |
| } |
| |
| #ifdef CONFIG_PM |
| /* Powers up or down the ISP1301 transceiver */ |
| static void isp1301_set_powerstate(struct lpc32xx_udc *udc, int enable) |
| { |
| if (enable != 0) |
| /* Power up ISP1301 - this ISP1301 will automatically wakeup |
| when VBUS is detected */ |
| i2c_smbus_write_byte_data(udc->isp1301_i2c_client, |
| ISP1301_I2C_MODE_CONTROL_2 | ISP1301_I2C_REG_CLEAR_ADDR, |
| MC2_GLOBAL_PWR_DN); |
| else |
| /* Power down ISP1301 */ |
| i2c_smbus_write_byte_data(udc->isp1301_i2c_client, |
| ISP1301_I2C_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN); |
| } |
| |
| static void power_work(struct work_struct *work) |
| { |
| struct lpc32xx_udc *udc = |
| container_of(work, struct lpc32xx_udc, power_job); |
| |
| isp1301_set_powerstate(udc, udc->poweron); |
| } |
| #endif |
| |
| /* |
| * |
| * USB protocol engine command/data read/write helper functions |
| * |
| */ |
| /* Issues a single command to the USB device state machine */ |
| static void udc_protocol_cmd_w(struct lpc32xx_udc *udc, u32 cmd) |
| { |
| u32 pass = 0; |
| int to; |
| |
| /* EP may lock on CLRI if this read isn't done */ |
| u32 tmp = readl(USBD_DEVINTST(udc->udp_baseaddr)); |
| (void) tmp; |
| |
| while (pass == 0) { |
| writel(USBD_CCEMPTY, USBD_DEVINTCLR(udc->udp_baseaddr)); |
| |
| /* Write command code */ |
| writel(cmd, USBD_CMDCODE(udc->udp_baseaddr)); |
| to = 10000; |
| while (((readl(USBD_DEVINTST(udc->udp_baseaddr)) & |
| USBD_CCEMPTY) == 0) && (to > 0)) { |
| to--; |
| } |
| |
| if (to > 0) |
| pass = 1; |
| |
| cpu_relax(); |
| } |
| } |
| |
| /* Issues 2 commands (or command and data) to the USB device state machine */ |
| static inline void udc_protocol_cmd_data_w(struct lpc32xx_udc *udc, u32 cmd, |
| u32 data) |
| { |
| udc_protocol_cmd_w(udc, cmd); |
| udc_protocol_cmd_w(udc, data); |
| } |
| |
| /* Issues a single command to the USB device state machine and reads |
| * response data */ |
| static u32 udc_protocol_cmd_r(struct lpc32xx_udc *udc, u32 cmd) |
| { |
| u32 tmp; |
| int to = 1000; |
| |
| /* Write a command and read data from the protocol engine */ |
| writel((USBD_CDFULL | USBD_CCEMPTY), |
| USBD_DEVINTCLR(udc->udp_baseaddr)); |
| |
| /* Write command code */ |
| udc_protocol_cmd_w(udc, cmd); |
| |
| tmp = readl(USBD_DEVINTST(udc->udp_baseaddr)); |
| while ((!(readl(USBD_DEVINTST(udc->udp_baseaddr)) & USBD_CDFULL)) |
| && (to > 0)) |
| to--; |
| if (!to) |
| dev_dbg(udc->dev, |
| "Protocol engine didn't receive response (CDFULL)\n"); |
| |
| return readl(USBD_CMDDATA(udc->udp_baseaddr)); |
| } |
| |
| /* |
| * |
| * USB device interrupt mask support functions |
| * |
| */ |
| /* Enable one or more USB device interrupts */ |
| static inline void uda_enable_devint(struct lpc32xx_udc *udc, u32 devmask) |
| { |
| udc->enabled_devints |= devmask; |
| writel(udc->enabled_devints, USBD_DEVINTEN(udc->udp_baseaddr)); |
| } |
| |
| /* Disable one or more USB device interrupts */ |
| static inline void uda_disable_devint(struct lpc32xx_udc *udc, u32 mask) |
| { |
| udc->enabled_devints &= ~mask; |
| writel(udc->enabled_devints, USBD_DEVINTEN(udc->udp_baseaddr)); |
| } |
| |
| /* Clear one or more USB device interrupts */ |
| static inline void uda_clear_devint(struct lpc32xx_udc *udc, u32 mask) |
| { |
| writel(mask, USBD_DEVINTCLR(udc->udp_baseaddr)); |
| } |
| |
| /* |
| * |
| * Endpoint interrupt disable/enable functions |
| * |
| */ |
| /* Enable one or more USB endpoint interrupts */ |
| static void uda_enable_hwepint(struct lpc32xx_udc *udc, u32 hwep) |
| { |
| udc->enabled_hwepints |= (1 << hwep); |
| writel(udc->enabled_hwepints, USBD_EPINTEN(udc->udp_baseaddr)); |
| } |
| |
| /* Disable one or more USB endpoint interrupts */ |
| static void uda_disable_hwepint(struct lpc32xx_udc *udc, u32 hwep) |
| { |
| udc->enabled_hwepints &= ~(1 << hwep); |
| writel(udc->enabled_hwepints, USBD_EPINTEN(udc->udp_baseaddr)); |
| } |
| |
| /* Clear one or more USB endpoint interrupts */ |
| static inline void uda_clear_hwepint(struct lpc32xx_udc *udc, u32 hwep) |
| { |
| writel((1 << hwep), USBD_EPINTCLR(udc->udp_baseaddr)); |
| } |
| |
| /* Enable DMA for the HW channel */ |
| static inline void udc_ep_dma_enable(struct lpc32xx_udc *udc, u32 hwep) |
| { |
| writel((1 << hwep), USBD_EPDMAEN(udc->udp_baseaddr)); |
| } |
| |
| /* Disable DMA for the HW channel */ |
| static inline void udc_ep_dma_disable(struct lpc32xx_udc *udc, u32 hwep) |
| { |
| writel((1 << hwep), USBD_EPDMADIS(udc->udp_baseaddr)); |
| } |
| |
| /* |
| * |
| * Endpoint realize/unrealize functions |
| * |
| */ |
| /* Before an endpoint can be used, it needs to be realized |
| * in the USB protocol engine - this realizes the endpoint. |
| * The interrupt (FIFO or DMA) is not enabled with this function */ |
| static void udc_realize_hwep(struct lpc32xx_udc *udc, u32 hwep, |
| u32 maxpacket) |
| { |
| int to = 1000; |
| |
| writel(USBD_EP_RLZED, USBD_DEVINTCLR(udc->udp_baseaddr)); |
| writel(hwep, USBD_EPIND(udc->udp_baseaddr)); |
| udc->realized_eps |= (1 << hwep); |
| writel(udc->realized_eps, USBD_REEP(udc->udp_baseaddr)); |
| writel(maxpacket, USBD_EPMAXPSIZE(udc->udp_baseaddr)); |
| |
| /* Wait until endpoint is realized in hardware */ |
| while ((!(readl(USBD_DEVINTST(udc->udp_baseaddr)) & |
| USBD_EP_RLZED)) && (to > 0)) |
| to--; |
| if (!to) |
| dev_dbg(udc->dev, "EP not correctly realized in hardware\n"); |
| |
| writel(USBD_EP_RLZED, USBD_DEVINTCLR(udc->udp_baseaddr)); |
| } |
| |
| /* Unrealize an EP */ |
| static void udc_unrealize_hwep(struct lpc32xx_udc *udc, u32 hwep) |
| { |
| udc->realized_eps &= ~(1 << hwep); |
| writel(udc->realized_eps, USBD_REEP(udc->udp_baseaddr)); |
| } |
| |
| /* |
| * |
| * Endpoint support functions |
| * |
| */ |
| /* Select and clear endpoint interrupt */ |
| static u32 udc_selep_clrint(struct lpc32xx_udc *udc, u32 hwep) |
| { |
| udc_protocol_cmd_w(udc, CMD_SEL_EP_CLRI(hwep)); |
| return udc_protocol_cmd_r(udc, DAT_SEL_EP_CLRI(hwep)); |
| } |
| |
| /* Disables the endpoint in the USB protocol engine */ |
| static void udc_disable_hwep(struct lpc32xx_udc *udc, u32 hwep) |
| { |
| udc_protocol_cmd_data_w(udc, CMD_SET_EP_STAT(hwep), |
| DAT_WR_BYTE(EP_STAT_DA)); |
| } |
| |
| /* Stalls the endpoint - endpoint will return STALL */ |
| static void udc_stall_hwep(struct lpc32xx_udc *udc, u32 hwep) |
| { |
| udc_protocol_cmd_data_w(udc, CMD_SET_EP_STAT(hwep), |
| DAT_WR_BYTE(EP_STAT_ST)); |
| } |
| |
| /* Clear stall or reset endpoint */ |
| static void udc_clrstall_hwep(struct lpc32xx_udc *udc, u32 hwep) |
| { |
| udc_protocol_cmd_data_w(udc, CMD_SET_EP_STAT(hwep), |
| DAT_WR_BYTE(0)); |
| } |
| |
| /* Select an endpoint for endpoint status, clear, validate */ |
| static void udc_select_hwep(struct lpc32xx_udc *udc, u32 hwep) |
| { |
| udc_protocol_cmd_w(udc, CMD_SEL_EP(hwep)); |
| } |
| |
| /* |
| * |
| * Endpoint buffer management functions |
| * |
| */ |
| /* Clear the current endpoint's buffer */ |
| static void udc_clr_buffer_hwep(struct lpc32xx_udc *udc, u32 hwep) |
| { |
| udc_select_hwep(udc, hwep); |
| udc_protocol_cmd_w(udc, CMD_CLR_BUF); |
| } |
| |
| /* Validate the current endpoint's buffer */ |
| static void udc_val_buffer_hwep(struct lpc32xx_udc *udc, u32 hwep) |
| { |
| udc_select_hwep(udc, hwep); |
| udc_protocol_cmd_w(udc, CMD_VALID_BUF); |
| } |
| |
| static inline u32 udc_clearep_getsts(struct lpc32xx_udc *udc, u32 hwep) |
| { |
| /* Clear EP interrupt */ |
| uda_clear_hwepint(udc, hwep); |
| return udc_selep_clrint(udc, hwep); |
| } |
| |
| /* |
| * |
| * USB EP DMA support |
| * |
| */ |
| /* Allocate a DMA Descriptor */ |
| static struct lpc32xx_usbd_dd_gad *udc_dd_alloc(struct lpc32xx_udc *udc) |
| { |
| dma_addr_t dma; |
| struct lpc32xx_usbd_dd_gad *dd; |
| |
| dd = (struct lpc32xx_usbd_dd_gad *) dma_pool_alloc( |
| udc->dd_cache, (GFP_KERNEL | GFP_DMA), &dma); |
| if (dd) |
| dd->this_dma = dma; |
| |
| return dd; |
| } |
| |
| /* Free a DMA Descriptor */ |
| static void udc_dd_free(struct lpc32xx_udc *udc, struct lpc32xx_usbd_dd_gad *dd) |
| { |
| dma_pool_free(udc->dd_cache, dd, dd->this_dma); |
| } |
| |
| /* |
| * |
| * USB setup and shutdown functions |
| * |
| */ |
| /* Enables or disables most of the USB system clocks when low power mode is |
| * needed. Clocks are typically started on a connection event, and disabled |
| * when a cable is disconnected */ |
| static void udc_clk_set(struct lpc32xx_udc *udc, int enable) |
| { |
| if (enable != 0) { |
| if (udc->clocked) |
| return; |
| |
| udc->clocked = 1; |
| |
| /* 48MHz PLL up */ |
| clk_enable(udc->usb_pll_clk); |
| |
| /* Enable the USB device clock */ |
| writel(readl(USB_CTRL) | USB_DEV_NEED_CLK_EN, |
| USB_CTRL); |
| |
| clk_enable(udc->usb_otg_clk); |
| } else { |
| if (!udc->clocked) |
| return; |
| |
| udc->clocked = 0; |
| |
| /* Never disable the USB_HCLK during normal operation */ |
| |
| /* 48MHz PLL dpwn */ |
| clk_disable(udc->usb_pll_clk); |
| |
| /* Disable the USB device clock */ |
| writel(readl(USB_CTRL) & ~USB_DEV_NEED_CLK_EN, |
| USB_CTRL); |
| |
| clk_disable(udc->usb_otg_clk); |
| } |
| } |
| |
| /* Set/reset USB device address */ |
| static void udc_set_address(struct lpc32xx_udc *udc, u32 addr) |
| { |
| /* Address will be latched at the end of the status phase, or |
| latched immediately if function is called twice */ |
| udc_protocol_cmd_data_w(udc, CMD_SET_ADDR, |
| DAT_WR_BYTE(DEV_EN | addr)); |
| } |
| |
| /* Setup up a IN request for DMA transfer - this consists of determining the |
| * list of DMA addresses for the transfer, allocating DMA Descriptors, |
| * installing the DD into the UDCA, and then enabling the DMA for that EP */ |
| static int udc_ep_in_req_dma(struct lpc32xx_udc *udc, struct lpc32xx_ep *ep) |
| { |
| struct lpc32xx_request *req; |
| u32 hwep = ep->hwep_num; |
| |
| ep->req_pending = 1; |
| |
| /* There will always be a request waiting here */ |
| req = list_entry(ep->queue.next, struct lpc32xx_request, queue); |
| |
| /* Place the DD Descriptor into the UDCA */ |
| udc->udca_v_base[hwep] = req->dd_desc_ptr->this_dma; |
| |
| /* Enable DMA and interrupt for the HW EP */ |
| udc_ep_dma_enable(udc, hwep); |
| |
| /* Clear ZLP if last packet is not of MAXP size */ |
| if (req->req.length % ep->ep.maxpacket) |
| req->send_zlp = 0; |
| |
| return 0; |
| } |
| |
| /* Setup up a OUT request for DMA transfer - this consists of determining the |
| * list of DMA addresses for the transfer, allocating DMA Descriptors, |
| * installing the DD into the UDCA, and then enabling the DMA for that EP */ |
| static int udc_ep_out_req_dma(struct lpc32xx_udc *udc, struct lpc32xx_ep *ep) |
| { |
| struct lpc32xx_request *req; |
| u32 hwep = ep->hwep_num; |
| |
| ep->req_pending = 1; |
| |
| /* There will always be a request waiting here */ |
| req = list_entry(ep->queue.next, struct lpc32xx_request, queue); |
| |
| /* Place the DD Descriptor into the UDCA */ |
| udc->udca_v_base[hwep] = req->dd_desc_ptr->this_dma; |
| |
| /* Enable DMA and interrupt for the HW EP */ |
| udc_ep_dma_enable(udc, hwep); |
| return 0; |
| } |
| |
| static void udc_disable(struct lpc32xx_udc *udc) |
| { |
| u32 i; |
| |
| /* Disable device */ |
| udc_protocol_cmd_data_w(udc, CMD_CFG_DEV, DAT_WR_BYTE(0)); |
| udc_protocol_cmd_data_w(udc, CMD_SET_DEV_STAT, DAT_WR_BYTE(0)); |
| |
| /* Disable all device interrupts (including EP0) */ |
| uda_disable_devint(udc, 0x3FF); |
| |
| /* Disable and reset all endpoint interrupts */ |
| for (i = 0; i < 32; i++) { |
| uda_disable_hwepint(udc, i); |
| uda_clear_hwepint(udc, i); |
| udc_disable_hwep(udc, i); |
| udc_unrealize_hwep(udc, i); |
| udc->udca_v_base[i] = 0; |
| |
| /* Disable and clear all interrupts and DMA */ |
| udc_ep_dma_disable(udc, i); |
| writel((1 << i), USBD_EOTINTCLR(udc->udp_baseaddr)); |
| writel((1 << i), USBD_NDDRTINTCLR(udc->udp_baseaddr)); |
| writel((1 << i), USBD_SYSERRTINTCLR(udc->udp_baseaddr)); |
| writel((1 << i), USBD_DMARCLR(udc->udp_baseaddr)); |
| } |
| |
| /* Disable DMA interrupts */ |
| writel(0, USBD_DMAINTEN(udc->udp_baseaddr)); |
| |
| writel(0, USBD_UDCAH(udc->udp_baseaddr)); |
| } |
| |
| static void udc_enable(struct lpc32xx_udc *udc) |
| { |
| u32 i; |
| struct lpc32xx_ep *ep = &udc->ep[0]; |
| |
| /* Start with known state */ |
| udc_disable(udc); |
| |
| /* Enable device */ |
| udc_protocol_cmd_data_w(udc, CMD_SET_DEV_STAT, DAT_WR_BYTE(DEV_CON)); |
| |
| /* EP interrupts on high priority, FRAME interrupt on low priority */ |
| writel(USBD_EP_FAST, USBD_DEVINTPRI(udc->udp_baseaddr)); |
| writel(0xFFFF, USBD_EPINTPRI(udc->udp_baseaddr)); |
| |
| /* Clear any pending device interrupts */ |
| writel(0x3FF, USBD_DEVINTCLR(udc->udp_baseaddr)); |
| |
| /* Setup UDCA - not yet used (DMA) */ |
| writel(udc->udca_p_base, USBD_UDCAH(udc->udp_baseaddr)); |
| |
| /* Only enable EP0 in and out for now, EP0 only works in FIFO mode */ |
| for (i = 0; i <= 1; i++) { |
| udc_realize_hwep(udc, i, ep->ep.maxpacket); |
| uda_enable_hwepint(udc, i); |
| udc_select_hwep(udc, i); |
| udc_clrstall_hwep(udc, i); |
| udc_clr_buffer_hwep(udc, i); |
| } |
| |
| /* Device interrupt setup */ |
| uda_clear_devint(udc, (USBD_ERR_INT | USBD_DEV_STAT | USBD_EP_SLOW | |
| USBD_EP_FAST)); |
| uda_enable_devint(udc, (USBD_ERR_INT | USBD_DEV_STAT | USBD_EP_SLOW | |
| USBD_EP_FAST)); |
| |
| /* Set device address to 0 - called twice to force a latch in the USB |
| engine without the need of a setup packet status closure */ |
| udc_set_address(udc, 0); |
| udc_set_address(udc, 0); |
| |
| /* Enable master DMA interrupts */ |
| writel((USBD_SYS_ERR_INT | USBD_EOT_INT), |
| USBD_DMAINTEN(udc->udp_baseaddr)); |
| |
| udc->dev_status = 0; |
| } |
| |
| /* |
| * |
| * USB device board specific events handled via callbacks |
| * |
| */ |
| /* Connection change event - notify board function of change */ |
| static void uda_power_event(struct lpc32xx_udc *udc, u32 conn) |
| { |
| /* Just notify of a connection change event (optional) */ |
| if (udc->board->conn_chgb != NULL) |
| udc->board->conn_chgb(conn); |
| } |
| |
| /* Suspend/resume event - notify board function of change */ |
| static void uda_resm_susp_event(struct lpc32xx_udc *udc, u32 conn) |
| { |
| /* Just notify of a Suspend/resume change event (optional) */ |
| if (udc->board->susp_chgb != NULL) |
| udc->board->susp_chgb(conn); |
| |
| if (conn) |
| udc->suspended = 0; |
| else |
| udc->suspended = 1; |
| } |
| |
| /* Remote wakeup enable/disable - notify board function of change */ |
| static void uda_remwkp_cgh(struct lpc32xx_udc *udc) |
| { |
| if (udc->board->rmwk_chgb != NULL) |
| udc->board->rmwk_chgb(udc->dev_status & |
| (1 << USB_DEVICE_REMOTE_WAKEUP)); |
| } |
| |
| /* Reads data from FIFO, adjusts for alignment and data size */ |
| static void udc_pop_fifo(struct lpc32xx_udc *udc, u8 *data, u32 bytes) |
| { |
| int n, i, bl; |
| u16 *p16; |
| u32 *p32, tmp, cbytes; |
| |
| /* Use optimal data transfer method based on source address and size */ |
| switch (((u32) data) & 0x3) { |
| case 0: /* 32-bit aligned */ |
| p32 = (u32 *) data; |
| cbytes = (bytes & ~0x3); |
| |
| /* Copy 32-bit aligned data first */ |
| for (n = 0; n < cbytes; n += 4) |
| *p32++ = readl(USBD_RXDATA(udc->udp_baseaddr)); |
| |
| /* Handle any remaining bytes */ |
| bl = bytes - cbytes; |
| if (bl) { |
| tmp = readl(USBD_RXDATA(udc->udp_baseaddr)); |
| for (n = 0; n < bl; n++) |
| data[cbytes + n] = ((tmp >> (n * 8)) & 0xFF); |
| |
| } |
| break; |
| |
| case 1: /* 8-bit aligned */ |
| case 3: |
| /* Each byte has to be handled independently */ |
| for (n = 0; n < bytes; n += 4) { |
| tmp = readl(USBD_RXDATA(udc->udp_baseaddr)); |
| |
| bl = bytes - n; |
| if (bl > 3) |
| bl = 3; |
| |
| for (i = 0; i < bl; i++) |
| data[n + i] = (u8) ((tmp >> (n * 8)) & 0xFF); |
| } |
| break; |
| |
| case 2: /* 16-bit aligned */ |
| p16 = (u16 *) data; |
| cbytes = (bytes & ~0x3); |
| |
| /* Copy 32-bit sized objects first with 16-bit alignment */ |
| for (n = 0; n < cbytes; n += 4) { |
| tmp = readl(USBD_RXDATA(udc->udp_baseaddr)); |
| *p16++ = (u16)(tmp & 0xFFFF); |
| *p16++ = (u16)((tmp >> 16) & 0xFFFF); |
| } |
| |
| /* Handle any remaining bytes */ |
| bl = bytes - cbytes; |
| if (bl) { |
| tmp = readl(USBD_RXDATA(udc->udp_baseaddr)); |
| for (n = 0; n < bl; n++) |
| data[cbytes + n] = ((tmp >> (n * 8)) & 0xFF); |
| } |
| break; |
| } |
| } |
| |
| /* Read data from the FIFO for an endpoint. This function is for endpoints (such |
| * as EP0) that don't use DMA. This function should only be called if a packet |
| * is known to be ready to read for the endpoint. Note that the endpoint must |
| * be selected in the protocol engine prior to this call. */ |
| static u32 udc_read_hwep(struct lpc32xx_udc *udc, u32 hwep, u32 *data, |
| u32 bytes) |
| { |
| u32 tmpv; |
| int to = 1000; |
| u32 tmp, hwrep = ((hwep & 0x1E) << 1) | CTRL_RD_EN; |
| |
| /* Setup read of endpoint */ |
| writel(hwrep, USBD_CTRL(udc->udp_baseaddr)); |
| |
| /* Wait until packet is ready */ |
| while ((((tmpv = readl(USBD_RXPLEN(udc->udp_baseaddr))) & |
| PKT_RDY) == 0) && (to > 0)) |
| to--; |
| if (!to) |
| dev_dbg(udc->dev, "No packet ready on FIFO EP read\n"); |
| |
| /* Mask out count */ |
| tmp = tmpv & PKT_LNGTH_MASK; |
| if (bytes < tmp) |
| tmp = bytes; |
| |
| if ((tmp > 0) && (data != NULL)) |
| udc_pop_fifo(udc, (u8 *) data, tmp); |
| |
| writel(((hwep & 0x1E) << 1), USBD_CTRL(udc->udp_baseaddr)); |
| |
| /* Clear the buffer */ |
| udc_clr_buffer_hwep(udc, hwep); |
| |
| return tmp; |
| } |
| |
| /* Stuffs data into the FIFO, adjusts for alignment and data size */ |
| static void udc_stuff_fifo(struct lpc32xx_udc *udc, u8 *data, u32 bytes) |
| { |
| int n, i, bl; |
| u16 *p16; |
| u32 *p32, tmp, cbytes; |
| |
| /* Use optimal data transfer method based on source address and size */ |
| switch (((u32) data) & 0x3) { |
| case 0: /* 32-bit aligned */ |
| p32 = (u32 *) data; |
| cbytes = (bytes & ~0x3); |
| |
| /* Copy 32-bit aligned data first */ |
| for (n = 0; n < cbytes; n += 4) |
| writel(*p32++, USBD_TXDATA(udc->udp_baseaddr)); |
| |
| /* Handle any remaining bytes */ |
| bl = bytes - cbytes; |
| if (bl) { |
| tmp = 0; |
| for (n = 0; n < bl; n++) |
| tmp |= data[cbytes + n] << (n * 8); |
| |
| writel(tmp, USBD_TXDATA(udc->udp_baseaddr)); |
| } |
| break; |
| |
| case 1: /* 8-bit aligned */ |
| case 3: |
| /* Each byte has to be handled independently */ |
| for (n = 0; n < bytes; n += 4) { |
| bl = bytes - n; |
| if (bl > 4) |
| bl = 4; |
| |
| tmp = 0; |
| for (i = 0; i < bl; i++) |
| tmp |= data[n + i] << (i * 8); |
| |
| writel(tmp, USBD_TXDATA(udc->udp_baseaddr)); |
| } |
| break; |
| |
| case 2: /* 16-bit aligned */ |
| p16 = (u16 *) data; |
| cbytes = (bytes & ~0x3); |
| |
| /* Copy 32-bit aligned data first */ |
| for (n = 0; n < cbytes; n += 4) { |
| tmp = *p16++ & 0xFFFF; |
| tmp |= (*p16++ & 0xFFFF) << 16; |
| writel(tmp, USBD_TXDATA(udc->udp_baseaddr)); |
| } |
| |
| /* Handle any remaining bytes */ |
| bl = bytes - cbytes; |
| if (bl) { |
| tmp = 0; |
| for (n = 0; n < bl; n++) |
| tmp |= data[cbytes + n] << (n * 8); |
| |
| writel(tmp, USBD_TXDATA(udc->udp_baseaddr)); |
| } |
| break; |
| } |
| } |
| |
| /* Write data to the FIFO for an endpoint. This function is for endpoints (such |
| * as EP0) that don't use DMA. Note that the endpoint must be selected in the |
| * protocol engine prior to this call. */ |
| static void udc_write_hwep(struct lpc32xx_udc *udc, u32 hwep, u32 *data, |
| u32 bytes) |
| { |
| u32 hwwep = ((hwep & 0x1E) << 1) | CTRL_WR_EN; |
| |
| if ((bytes > 0) && (data == NULL)) |
| return; |
| |
| /* Setup write of endpoint */ |
| writel(hwwep, USBD_CTRL(udc->udp_baseaddr)); |
| |
| writel(bytes, USBD_TXPLEN(udc->udp_baseaddr)); |
| |
| /* Need at least 1 byte to trigger TX */ |
| if (bytes == 0) |
| writel(0, USBD_TXDATA(udc->udp_baseaddr)); |
| else |
| udc_stuff_fifo(udc, (u8 *) data, bytes); |
| |
| writel(((hwep & 0x1E) << 1), USBD_CTRL(udc->udp_baseaddr)); |
| |
| udc_val_buffer_hwep(udc, hwep); |
| } |
| |
| /* USB device reset - resets USB to a default state with just EP0 |
| enabled */ |
| static void uda_usb_reset(struct lpc32xx_udc *udc) |
| { |
| u32 i = 0; |
| /* Re-init device controller and EP0 */ |
| udc_enable(udc); |
| udc->gadget.speed = USB_SPEED_FULL; |
| |
| for (i = 1; i < NUM_ENDPOINTS; i++) { |
| struct lpc32xx_ep *ep = &udc->ep[i]; |
| ep->req_pending = 0; |
| } |
| } |
| |
| /* Send a ZLP on EP0 */ |
| static void udc_ep0_send_zlp(struct lpc32xx_udc *udc) |
| { |
| udc_write_hwep(udc, EP_IN, NULL, 0); |
| } |
| |
| /* Get current frame number */ |
| static u16 udc_get_current_frame(struct lpc32xx_udc *udc) |
| { |
| u16 flo, fhi; |
| |
| udc_protocol_cmd_w(udc, CMD_RD_FRAME); |
| flo = (u16) udc_protocol_cmd_r(udc, DAT_RD_FRAME); |
| fhi = (u16) udc_protocol_cmd_r(udc, DAT_RD_FRAME); |
| |
| return (fhi << 8) | flo; |
| } |
| |
| /* Set the device as configured - enables all endpoints */ |
| static inline void udc_set_device_configured(struct lpc32xx_udc *udc) |
| { |
| udc_protocol_cmd_data_w(udc, CMD_CFG_DEV, DAT_WR_BYTE(CONF_DVICE)); |
| } |
| |
| /* Set the device as unconfigured - disables all endpoints */ |
| static inline void udc_set_device_unconfigured(struct lpc32xx_udc *udc) |
| { |
| udc_protocol_cmd_data_w(udc, CMD_CFG_DEV, DAT_WR_BYTE(0)); |
| } |
| |
| /* reinit == restore initial software state */ |
| static void udc_reinit(struct lpc32xx_udc *udc) |
| { |
| u32 i; |
| |
| INIT_LIST_HEAD(&udc->gadget.ep_list); |
| INIT_LIST_HEAD(&udc->gadget.ep0->ep_list); |
| |
| for (i = 0; i < NUM_ENDPOINTS; i++) { |
| struct lpc32xx_ep *ep = &udc->ep[i]; |
| |
| if (i != 0) |
| list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list); |
| usb_ep_set_maxpacket_limit(&ep->ep, ep->maxpacket); |
| INIT_LIST_HEAD(&ep->queue); |
| ep->req_pending = 0; |
| } |
| |
| udc->ep0state = WAIT_FOR_SETUP; |
| } |
| |
| /* Must be called with lock */ |
| static void done(struct lpc32xx_ep *ep, struct lpc32xx_request *req, int status) |
| { |
| struct lpc32xx_udc *udc = ep->udc; |
| |
| list_del_init(&req->queue); |
| if (req->req.status == -EINPROGRESS) |
| req->req.status = status; |
| else |
| status = req->req.status; |
| |
| if (ep->lep) { |
| usb_gadget_unmap_request(&udc->gadget, &req->req, ep->is_in); |
| |
| /* Free DDs */ |
| udc_dd_free(udc, req->dd_desc_ptr); |
| } |
| |
| if (status && status != -ESHUTDOWN) |
| ep_dbg(ep, "%s done %p, status %d\n", ep->ep.name, req, status); |
| |
| ep->req_pending = 0; |
| spin_unlock(&udc->lock); |
| req->req.complete(&ep->ep, &req->req); |
| spin_lock(&udc->lock); |
| } |
| |
| /* Must be called with lock */ |
| static void nuke(struct lpc32xx_ep *ep, int status) |
| { |
| struct lpc32xx_request *req; |
| |
| while (!list_empty(&ep->queue)) { |
| req = list_entry(ep->queue.next, struct lpc32xx_request, queue); |
| done(ep, req, status); |
| } |
| |
| if (status == -ESHUTDOWN) { |
| uda_disable_hwepint(ep->udc, ep->hwep_num); |
| udc_disable_hwep(ep->udc, ep->hwep_num); |
| } |
| } |
| |
| /* IN endpoint 0 transfer */ |
| static int udc_ep0_in_req(struct lpc32xx_udc *udc) |
| { |
| struct lpc32xx_request *req; |
| struct lpc32xx_ep *ep0 = &udc->ep[0]; |
| u32 tsend, ts = 0; |
| |
| if (list_empty(&ep0->queue)) |
| /* Nothing to send */ |
| return 0; |
| else |
| req = list_entry(ep0->queue.next, struct lpc32xx_request, |
| queue); |
| |
| tsend = ts = req->req.length - req->req.actual; |
| if (ts == 0) { |
| /* Send a ZLP */ |
| udc_ep0_send_zlp(udc); |
| done(ep0, req, 0); |
| return 1; |
| } else if (ts > ep0->ep.maxpacket) |
| ts = ep0->ep.maxpacket; /* Just send what we can */ |
| |
| /* Write data to the EP0 FIFO and start transfer */ |
| udc_write_hwep(udc, EP_IN, (req->req.buf + req->req.actual), ts); |
| |
| /* Increment data pointer */ |
| req->req.actual += ts; |
| |
| if (tsend >= ep0->ep.maxpacket) |
| return 0; /* Stay in data transfer state */ |
| |
| /* Transfer request is complete */ |
| udc->ep0state = WAIT_FOR_SETUP; |
| done(ep0, req, 0); |
| return 1; |
| } |
| |
| /* OUT endpoint 0 transfer */ |
| static int udc_ep0_out_req(struct lpc32xx_udc *udc) |
| { |
| struct lpc32xx_request *req; |
| struct lpc32xx_ep *ep0 = &udc->ep[0]; |
| u32 tr, bufferspace; |
| |
| if (list_empty(&ep0->queue)) |
| return 0; |
| else |
| req = list_entry(ep0->queue.next, struct lpc32xx_request, |
| queue); |
| |
| if (req) { |
| if (req->req.length == 0) { |
| /* Just dequeue request */ |
| done(ep0, req, 0); |
| udc->ep0state = WAIT_FOR_SETUP; |
| return 1; |
| } |
| |
| /* Get data from FIFO */ |
| bufferspace = req->req.length - req->req.actual; |
| if (bufferspace > ep0->ep.maxpacket) |
| bufferspace = ep0->ep.maxpacket; |
| |
| /* Copy data to buffer */ |
| prefetchw(req->req.buf + req->req.actual); |
| tr = udc_read_hwep(udc, EP_OUT, req->req.buf + req->req.actual, |
| bufferspace); |
| req->req.actual += bufferspace; |
| |
| if (tr < ep0->ep.maxpacket) { |
| /* This is the last packet */ |
| done(ep0, req, 0); |
| udc->ep0state = WAIT_FOR_SETUP; |
| return 1; |
| } |
| } |
| |
| return 0; |
| } |
| |
| /* Must be called with lock */ |
| static void stop_activity(struct lpc32xx_udc *udc) |
| { |
| struct usb_gadget_driver *driver = udc->driver; |
| int i; |
| |
| if (udc->gadget.speed == USB_SPEED_UNKNOWN) |
| driver = NULL; |
| |
| udc->gadget.speed = USB_SPEED_UNKNOWN; |
| udc->suspended = 0; |
| |
| for (i = 0; i < NUM_ENDPOINTS; i++) { |
| struct lpc32xx_ep *ep = &udc->ep[i]; |
| nuke(ep, -ESHUTDOWN); |
| } |
| if (driver) { |
| spin_unlock(&udc->lock); |
| driver->disconnect(&udc->gadget); |
| spin_lock(&udc->lock); |
| } |
| |
| isp1301_pullup_enable(udc, 0, 0); |
| udc_disable(udc); |
| udc_reinit(udc); |
| } |
| |
| /* |
| * Activate or kill host pullup |
| * Can be called with or without lock |
| */ |
| static void pullup(struct lpc32xx_udc *udc, int is_on) |
| { |
| if (!udc->clocked) |
| return; |
| |
| if (!udc->enabled || !udc->vbus) |
| is_on = 0; |
| |
| if (is_on != udc->pullup) |
| isp1301_pullup_enable(udc, is_on, 0); |
| } |
| |
| /* Must be called without lock */ |
| static int lpc32xx_ep_disable(struct usb_ep *_ep) |
| { |
| struct lpc32xx_ep *ep = container_of(_ep, struct lpc32xx_ep, ep); |
| struct lpc32xx_udc *udc = ep->udc; |
| unsigned long flags; |
| |
| if ((ep->hwep_num_base == 0) || (ep->hwep_num == 0)) |
| return -EINVAL; |
| spin_lock_irqsave(&udc->lock, flags); |
| |
| nuke(ep, -ESHUTDOWN); |
| |
| /* Clear all DMA statuses for this EP */ |
| udc_ep_dma_disable(udc, ep->hwep_num); |
| writel(1 << ep->hwep_num, USBD_EOTINTCLR(udc->udp_baseaddr)); |
| writel(1 << ep->hwep_num, USBD_NDDRTINTCLR(udc->udp_baseaddr)); |
| writel(1 << ep->hwep_num, USBD_SYSERRTINTCLR(udc->udp_baseaddr)); |
| writel(1 << ep->hwep_num, USBD_DMARCLR(udc->udp_baseaddr)); |
| |
| /* Remove the DD pointer in the UDCA */ |
| udc->udca_v_base[ep->hwep_num] = 0; |
| |
| /* Disable and reset endpoint and interrupt */ |
| uda_clear_hwepint(udc, ep->hwep_num); |
| udc_unrealize_hwep(udc, ep->hwep_num); |
| |
| ep->hwep_num = 0; |
| |
| spin_unlock_irqrestore(&udc->lock, flags); |
| |
| atomic_dec(&udc->enabled_ep_cnt); |
| wake_up(&udc->ep_disable_wait_queue); |
| |
| return 0; |
| } |
| |
| /* Must be called without lock */ |
| static int lpc32xx_ep_enable(struct usb_ep *_ep, |
| const struct usb_endpoint_descriptor *desc) |
| { |
| struct lpc32xx_ep *ep = container_of(_ep, struct lpc32xx_ep, ep); |
| struct lpc32xx_udc *udc = ep->udc; |
| u16 maxpacket; |
| u32 tmp; |
| unsigned long flags; |
| |
| /* Verify EP data */ |
| if ((!_ep) || (!ep) || (!desc) || |
| (desc->bDescriptorType != USB_DT_ENDPOINT)) { |
| dev_dbg(udc->dev, "bad ep or descriptor\n"); |
| return -EINVAL; |
| } |
| maxpacket = usb_endpoint_maxp(desc); |
| if ((maxpacket == 0) || (maxpacket > ep->maxpacket)) { |
| dev_dbg(udc->dev, "bad ep descriptor's packet size\n"); |
| return -EINVAL; |
| } |
| |
| /* Don't touch EP0 */ |
| if (ep->hwep_num_base == 0) { |
| dev_dbg(udc->dev, "Can't re-enable EP0!!!\n"); |
| return -EINVAL; |
| } |
| |
| /* Is driver ready? */ |
| if ((!udc->driver) || (udc->gadget.speed == USB_SPEED_UNKNOWN)) { |
| dev_dbg(udc->dev, "bogus device state\n"); |
| return -ESHUTDOWN; |
| } |
| |
| tmp = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK; |
| switch (tmp) { |
| case USB_ENDPOINT_XFER_CONTROL: |
| return -EINVAL; |
| |
| case USB_ENDPOINT_XFER_INT: |
| if (maxpacket > ep->maxpacket) { |
| dev_dbg(udc->dev, |
| "Bad INT endpoint maxpacket %d\n", maxpacket); |
| return -EINVAL; |
| } |
| break; |
| |
| case USB_ENDPOINT_XFER_BULK: |
| switch (maxpacket) { |
| case 8: |
| case 16: |
| case 32: |
| case 64: |
| break; |
| |
| default: |
| dev_dbg(udc->dev, |
| "Bad BULK endpoint maxpacket %d\n", maxpacket); |
| return -EINVAL; |
| } |
| break; |
| |
| case USB_ENDPOINT_XFER_ISOC: |
| break; |
| } |
| spin_lock_irqsave(&udc->lock, flags); |
| |
| /* Initialize endpoint to match the selected descriptor */ |
| ep->is_in = (desc->bEndpointAddress & USB_DIR_IN) != 0; |
| ep->ep.maxpacket = maxpacket; |
| |
| /* Map hardware endpoint from base and direction */ |
| if (ep->is_in) |
| /* IN endpoints are offset 1 from the OUT endpoint */ |
| ep->hwep_num = ep->hwep_num_base + EP_IN; |
| else |
| ep->hwep_num = ep->hwep_num_base; |
| |
| ep_dbg(ep, "EP enabled: %s, HW:%d, MP:%d IN:%d\n", ep->ep.name, |
| ep->hwep_num, maxpacket, (ep->is_in == 1)); |
| |
| /* Realize the endpoint, interrupt is enabled later when |
| * buffers are queued, IN EPs will NAK until buffers are ready */ |
| udc_realize_hwep(udc, ep->hwep_num, ep->ep.maxpacket); |
| udc_clr_buffer_hwep(udc, ep->hwep_num); |
| uda_disable_hwepint(udc, ep->hwep_num); |
| udc_clrstall_hwep(udc, ep->hwep_num); |
| |
| /* Clear all DMA statuses for this EP */ |
| udc_ep_dma_disable(udc, ep->hwep_num); |
| writel(1 << ep->hwep_num, USBD_EOTINTCLR(udc->udp_baseaddr)); |
| writel(1 << ep->hwep_num, USBD_NDDRTINTCLR(udc->udp_baseaddr)); |
| writel(1 << ep->hwep_num, USBD_SYSERRTINTCLR(udc->udp_baseaddr)); |
| writel(1 << ep->hwep_num, USBD_DMARCLR(udc->udp_baseaddr)); |
| |
| spin_unlock_irqrestore(&udc->lock, flags); |
| |
| atomic_inc(&udc->enabled_ep_cnt); |
| return 0; |
| } |
| |
| /* |
| * Allocate a USB request list |
| * Can be called with or without lock |
| */ |
| static struct usb_request *lpc32xx_ep_alloc_request(struct usb_ep *_ep, |
| gfp_t gfp_flags) |
| { |
| struct lpc32xx_request *req; |
| |
| req = kzalloc(sizeof(struct lpc32xx_request), gfp_flags); |
| if (!req) |
| return NULL; |
| |
| INIT_LIST_HEAD(&req->queue); |
| return &req->req; |
| } |
| |
| /* |
| * De-allocate a USB request list |
| * Can be called with or without lock |
| */ |
| static void lpc32xx_ep_free_request(struct usb_ep *_ep, |
| struct usb_request *_req) |
| { |
| struct lpc32xx_request *req; |
| |
| req = container_of(_req, struct lpc32xx_request, req); |
| BUG_ON(!list_empty(&req->queue)); |
| kfree(req); |
| } |
| |
| /* Must be called without lock */ |
| static int lpc32xx_ep_queue(struct usb_ep *_ep, |
| struct usb_request *_req, gfp_t gfp_flags) |
| { |
| struct lpc32xx_request *req; |
| struct lpc32xx_ep *ep; |
| struct lpc32xx_udc *udc; |
| unsigned long flags; |
| int status = 0; |
| |
| req = container_of(_req, struct lpc32xx_request, req); |
| ep = container_of(_ep, struct lpc32xx_ep, ep); |
| |
| if (!_req || !_req->complete || !_req->buf || |
| !list_empty(&req->queue)) |
| return -EINVAL; |
| |
| udc = ep->udc; |
| |
| if (!_ep) { |
| dev_dbg(udc->dev, "invalid ep\n"); |
| return -EINVAL; |
| } |
| |
| |
| if ((!udc) || (!udc->driver) || |
| (udc->gadget.speed == USB_SPEED_UNKNOWN)) { |
| dev_dbg(udc->dev, "invalid device\n"); |
| return -EINVAL; |
| } |
| |
| if (ep->lep) { |
| struct lpc32xx_usbd_dd_gad *dd; |
| |
| status = usb_gadget_map_request(&udc->gadget, _req, ep->is_in); |
| if (status) |
| return status; |
| |
| /* For the request, build a list of DDs */ |
| dd = udc_dd_alloc(udc); |
| if (!dd) { |
| /* Error allocating DD */ |
| return -ENOMEM; |
| } |
| req->dd_desc_ptr = dd; |
| |
| /* Setup the DMA descriptor */ |
| dd->dd_next_phy = dd->dd_next_v = 0; |
| dd->dd_buffer_addr = req->req.dma; |
| dd->dd_status = 0; |
| |
| /* Special handling for ISO EPs */ |
| if (ep->eptype == EP_ISO_TYPE) { |
| dd->dd_setup = DD_SETUP_ISO_EP | |
| DD_SETUP_PACKETLEN(0) | |
| DD_SETUP_DMALENBYTES(1); |
| dd->dd_iso_ps_mem_addr = dd->this_dma + 24; |
| if (ep->is_in) |
| dd->iso_status[0] = req->req.length; |
| else |
| dd->iso_status[0] = 0; |
| } else |
| dd->dd_setup = DD_SETUP_PACKETLEN(ep->ep.maxpacket) | |
| DD_SETUP_DMALENBYTES(req->req.length); |
| } |
| |
| ep_dbg(ep, "%s queue req %p len %d buf %p (in=%d) z=%d\n", _ep->name, |
| _req, _req->length, _req->buf, ep->is_in, _req->zero); |
| |
| spin_lock_irqsave(&udc->lock, flags); |
| |
| _req->status = -EINPROGRESS; |
| _req->actual = 0; |
| req->send_zlp = _req->zero; |
| |
| /* Kickstart empty queues */ |
| if (list_empty(&ep->queue)) { |
| list_add_tail(&req->queue, &ep->queue); |
| |
| if (ep->hwep_num_base == 0) { |
| /* Handle expected data direction */ |
| if (ep->is_in) { |
| /* IN packet to host */ |
| udc->ep0state = DATA_IN; |
| status = udc_ep0_in_req(udc); |
| } else { |
| /* OUT packet from host */ |
| udc->ep0state = DATA_OUT; |
| status = udc_ep0_out_req(udc); |
| } |
| } else if (ep->is_in) { |
| /* IN packet to host and kick off transfer */ |
| if (!ep->req_pending) |
| udc_ep_in_req_dma(udc, ep); |
| } else |
| /* OUT packet from host and kick off list */ |
| if (!ep->req_pending) |
| udc_ep_out_req_dma(udc, ep); |
| } else |
| list_add_tail(&req->queue, &ep->queue); |
| |
| spin_unlock_irqrestore(&udc->lock, flags); |
| |
| return (status < 0) ? status : 0; |
| } |
| |
| /* Must be called without lock */ |
| static int lpc32xx_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) |
| { |
| struct lpc32xx_ep *ep; |
| struct lpc32xx_request *req; |
| unsigned long flags; |
| |
| ep = container_of(_ep, struct lpc32xx_ep, ep); |
| if (!_ep || ep->hwep_num_base == 0) |
| return -EINVAL; |
| |
| spin_lock_irqsave(&ep->udc->lock, flags); |
| |
| /* make sure it's actually queued on this endpoint */ |
| list_for_each_entry(req, &ep->queue, queue) { |
| if (&req->req == _req) |
| break; |
| } |
| if (&req->req != _req) { |
| spin_unlock_irqrestore(&ep->udc->lock, flags); |
| return -EINVAL; |
| } |
| |
| done(ep, req, -ECONNRESET); |
| |
| spin_unlock_irqrestore(&ep->udc->lock, flags); |
| |
| return 0; |
| } |
| |
| /* Must be called without lock */ |
| static int lpc32xx_ep_set_halt(struct usb_ep *_ep, int value) |
| { |
| struct lpc32xx_ep *ep = container_of(_ep, struct lpc32xx_ep, ep); |
| struct lpc32xx_udc *udc = ep->udc; |
| unsigned long flags; |
| |
| if ((!ep) || (ep->hwep_num <= 1)) |
| return -EINVAL; |
| |
| /* Don't halt an IN EP */ |
| if (ep->is_in) |
| return -EAGAIN; |
| |
| spin_lock_irqsave(&udc->lock, flags); |
| |
| if (value == 1) { |
| /* stall */ |
| udc_protocol_cmd_data_w(udc, CMD_SET_EP_STAT(ep->hwep_num), |
| DAT_WR_BYTE(EP_STAT_ST)); |
| } else { |
| /* End stall */ |
| ep->wedge = 0; |
| udc_protocol_cmd_data_w(udc, CMD_SET_EP_STAT(ep->hwep_num), |
| DAT_WR_BYTE(0)); |
| } |
| |
| spin_unlock_irqrestore(&udc->lock, flags); |
| |
| return 0; |
| } |
| |
| /* set the halt feature and ignores clear requests */ |
| static int lpc32xx_ep_set_wedge(struct usb_ep *_ep) |
| { |
| struct lpc32xx_ep *ep = container_of(_ep, struct lpc32xx_ep, ep); |
| |
| if (!_ep || !ep->udc) |
| return -EINVAL; |
| |
| ep->wedge = 1; |
| |
| return usb_ep_set_halt(_ep); |
| } |
| |
| static const struct usb_ep_ops lpc32xx_ep_ops = { |
| .enable = lpc32xx_ep_enable, |
| .disable = lpc32xx_ep_disable, |
| .alloc_request = lpc32xx_ep_alloc_request, |
| .free_request = lpc32xx_ep_free_request, |
| .queue = lpc32xx_ep_queue, |
| .dequeue = lpc32xx_ep_dequeue, |
| .set_halt = lpc32xx_ep_set_halt, |
| .set_wedge = lpc32xx_ep_set_wedge, |
| }; |
| |
| /* Send a ZLP on a non-0 IN EP */ |
| void udc_send_in_zlp(struct lpc32xx_udc *udc, struct lpc32xx_ep *ep) |
| { |
| /* Clear EP status */ |
| udc_clearep_getsts(udc, ep->hwep_num); |
| |
| /* Send ZLP via FIFO mechanism */ |
| udc_write_hwep(udc, ep->hwep_num, NULL, 0); |
| } |
| |
| /* |
| * Handle EP completion for ZLP |
| * This function will only be called when a delayed ZLP needs to be sent out |
| * after a DMA transfer has filled both buffers. |
| */ |
| void udc_handle_eps(struct lpc32xx_udc *udc, struct lpc32xx_ep *ep) |
| { |
| u32 epstatus; |
| struct lpc32xx_request *req; |
| |
| if (ep->hwep_num <= 0) |
| return; |
| |
| uda_clear_hwepint(udc, ep->hwep_num); |
| |
| /* If this interrupt isn't enabled, return now */ |
| if (!(udc->enabled_hwepints & (1 << ep->hwep_num))) |
| return; |
| |
| /* Get endpoint status */ |
| epstatus = udc_clearep_getsts(udc, ep->hwep_num); |
| |
| /* |
| * This should never happen, but protect against writing to the |
| * buffer when full. |
| */ |
| if (epstatus & EP_SEL_F) |
| return; |
| |
| if (ep->is_in) { |
| udc_send_in_zlp(udc, ep); |
| uda_disable_hwepint(udc, ep->hwep_num); |
| } else |
| return; |
| |
| /* If there isn't a request waiting, something went wrong */ |
| req = list_entry(ep->queue.next, struct lpc32xx_request, queue); |
| if (req) { |
| done(ep, req, 0); |
| |
| /* Start another request if ready */ |
| if (!list_empty(&ep->queue)) { |
| if (ep->is_in) |
| udc_ep_in_req_dma(udc, ep); |
| else |
| udc_ep_out_req_dma(udc, ep); |
| } else |
| ep->req_pending = 0; |
| } |
| } |
| |
| |
| /* DMA end of transfer completion */ |
| static void udc_handle_dma_ep(struct lpc32xx_udc *udc, struct lpc32xx_ep *ep) |
| { |
| u32 status, epstatus; |
| struct lpc32xx_request *req; |
| struct lpc32xx_usbd_dd_gad *dd; |
| |
| #ifdef CONFIG_USB_GADGET_DEBUG_FILES |
| ep->totalints++; |
| #endif |
| |
| req = list_entry(ep->queue.next, struct lpc32xx_request, queue); |
| if (!req) { |
| ep_err(ep, "DMA interrupt on no req!\n"); |
| return; |
| } |
| dd = req->dd_desc_ptr; |
| |
| /* DMA descriptor should always be retired for this call */ |
| if (!(dd->dd_status & DD_STATUS_DD_RETIRED)) |
| ep_warn(ep, "DMA descriptor did not retire\n"); |
| |
| /* Disable DMA */ |
| udc_ep_dma_disable(udc, ep->hwep_num); |
| writel((1 << ep->hwep_num), USBD_EOTINTCLR(udc->udp_baseaddr)); |
| writel((1 << ep->hwep_num), USBD_NDDRTINTCLR(udc->udp_baseaddr)); |
| |
| /* System error? */ |
| if (readl(USBD_SYSERRTINTST(udc->udp_baseaddr)) & |
| (1 << ep->hwep_num)) { |
| writel((1 << ep->hwep_num), |
| USBD_SYSERRTINTCLR(udc->udp_baseaddr)); |
| ep_err(ep, "AHB critical error!\n"); |
| ep->req_pending = 0; |
| |
| /* The error could have occurred on a packet of a multipacket |
| * transfer, so recovering the transfer is not possible. Close |
| * the request with an error */ |
| done(ep, req, -ECONNABORTED); |
| return; |
| } |
| |
| /* Handle the current DD's status */ |
| status = dd->dd_status; |
| switch (status & DD_STATUS_STS_MASK) { |
| case DD_STATUS_STS_NS: |
| /* DD not serviced? This shouldn't happen! */ |
| ep->req_pending = 0; |
| ep_err(ep, "DMA critical EP error: DD not serviced (0x%x)!\n", |
| status); |
| |
| done(ep, req, -ECONNABORTED); |
| return; |
| |
| case DD_STATUS_STS_BS: |
| /* Interrupt only fires on EOT - This shouldn't happen! */ |
| ep->req_pending = 0; |
| ep_err(ep, "DMA critical EP error: EOT prior to service completion (0x%x)!\n", |
| status); |
| done(ep, req, -ECONNABORTED); |
| return; |
| |
| case DD_STATUS_STS_NC: |
| case DD_STATUS_STS_DUR: |
| /* Really just a short packet, not an underrun */ |
| /* This is a good status and what we expect */ |
| break; |
| |
| default: |
| /* Data overrun, system error, or unknown */ |
| ep->req_pending = 0; |
| ep_err(ep, "DMA critical EP error: System error (0x%x)!\n", |
| status); |
| done(ep, req, -ECONNABORTED); |
| return; |
| } |
| |
| /* ISO endpoints are handled differently */ |
| if (ep->eptype == EP_ISO_TYPE) { |
| if (ep->is_in) |
| req->req.actual = req->req.length; |
| else |
| req->req.actual = dd->iso_status[0] & 0xFFFF; |
| } else |
| req->req.actual += DD_STATUS_CURDMACNT(status); |
| |
| /* Send a ZLP if necessary. This will be done for non-int |
| * packets which have a size that is a divisor of MAXP */ |
| if (req->send_zlp) { |
| /* |
| * If at least 1 buffer is available, send the ZLP now. |
| * Otherwise, the ZLP send needs to be deferred until a |
| * buffer is available. |
| */ |
| if (udc_clearep_getsts(udc, ep->hwep_num) & EP_SEL_F) { |
| udc_clearep_getsts(udc, ep->hwep_num); |
| uda_enable_hwepint(udc, ep->hwep_num); |
| epstatus = udc_clearep_getsts(udc, ep->hwep_num); |
| |
| /* Let the EP interrupt handle the ZLP */ |
| return; |
| } else |
| udc_send_in_zlp(udc, ep); |
| } |
| |
| /* Transfer request is complete */ |
| done(ep, req, 0); |
| |
| /* Start another request if ready */ |
| udc_clearep_getsts(udc, ep->hwep_num); |
| if (!list_empty((&ep->queue))) { |
| if (ep->is_in) |
| udc_ep_in_req_dma(udc, ep); |
| else |
| udc_ep_out_req_dma(udc, ep); |
| } else |
| ep->req_pending = 0; |
| |
| } |
| |
| /* |
| * |
| * Endpoint 0 functions |
| * |
| */ |
| static void udc_handle_dev(struct lpc32xx_udc *udc) |
| { |
| u32 tmp; |
| |
| udc_protocol_cmd_w(udc, CMD_GET_DEV_STAT); |
| tmp = udc_protocol_cmd_r(udc, DAT_GET_DEV_STAT); |
| |
| if (tmp & DEV_RST) |
| uda_usb_reset(udc); |
| else if (tmp & DEV_CON_CH) |
| uda_power_event(udc, (tmp & DEV_CON)); |
| else if (tmp & DEV_SUS_CH) { |
| if (tmp & DEV_SUS) { |
| if (udc->vbus == 0) |
| stop_activity(udc); |
| else if ((udc->gadget.speed != USB_SPEED_UNKNOWN) && |
| udc->driver) { |
| /* Power down transceiver */ |
| udc->poweron = 0; |
| schedule_work(&udc->pullup_job); |
| uda_resm_susp_event(udc, 1); |
| } |
| } else if ((udc->gadget.speed != USB_SPEED_UNKNOWN) && |
| udc->driver && udc->vbus) { |
| uda_resm_susp_event(udc, 0); |
| /* Power up transceiver */ |
| udc->poweron = 1; |
| schedule_work(&udc->pullup_job); |
| } |
| } |
| } |
| |
| static int udc_get_status(struct lpc32xx_udc *udc, u16 reqtype, u16 wIndex) |
| { |
| struct lpc32xx_ep *ep; |
| u32 ep0buff = 0, tmp; |
| |
| switch (reqtype & USB_RECIP_MASK) { |
| case USB_RECIP_INTERFACE: |
| break; /* Not supported */ |
| |
| case USB_RECIP_DEVICE: |
| ep0buff = (udc->selfpowered << USB_DEVICE_SELF_POWERED); |
| if (udc->dev_status & (1 << USB_DEVICE_REMOTE_WAKEUP)) |
| ep0buff |= (1 << USB_DEVICE_REMOTE_WAKEUP); |
| break; |
| |
| case USB_RECIP_ENDPOINT: |
| tmp = wIndex & USB_ENDPOINT_NUMBER_MASK; |
| ep = &udc->ep[tmp]; |
| if ((tmp == 0) || (tmp >= NUM_ENDPOINTS)) |
| return -EOPNOTSUPP; |
| |
| if (wIndex & USB_DIR_IN) { |
| if (!ep->is_in) |
| return -EOPNOTSUPP; /* Something's wrong */ |
| } else if (ep->is_in) |
| return -EOPNOTSUPP; /* Not an IN endpoint */ |
| |
| /* Get status of the endpoint */ |
| udc_protocol_cmd_w(udc, CMD_SEL_EP(ep->hwep_num)); |
| tmp = udc_protocol_cmd_r(udc, DAT_SEL_EP(ep->hwep_num)); |
| |
| if (tmp & EP_SEL_ST) |
| ep0buff = (1 << USB_ENDPOINT_HALT); |
| else |
| ep0buff = 0; |
| break; |
| |
| default: |
| break; |
| } |
| |
| /* Return data */ |
| udc_write_hwep(udc, EP_IN, &ep0buff, 2); |
| |
| return 0; |
| } |
| |
| static void udc_handle_ep0_setup(struct lpc32xx_udc *udc) |
| { |
| struct lpc32xx_ep *ep, *ep0 = &udc->ep[0]; |
| struct usb_ctrlrequest ctrlpkt; |
| int i, bytes; |
| u16 wIndex, wValue, wLength, reqtype, req, tmp; |
| |
| /* Nuke previous transfers */ |
| nuke(ep0, -EPROTO); |
| |
| /* Get setup packet */ |
| bytes = udc_read_hwep(udc, EP_OUT, (u32 *) &ctrlpkt, 8); |
| if (bytes != 8) { |
| ep_warn(ep0, "Incorrectly sized setup packet (s/b 8, is %d)!\n", |
| bytes); |
| return; |
| } |
| |
| /* Native endianness */ |
| wIndex = le16_to_cpu(ctrlpkt.wIndex); |
| wValue = le16_to_cpu(ctrlpkt.wValue); |
| wLength = le16_to_cpu(ctrlpkt.wLength); |
| reqtype = le16_to_cpu(ctrlpkt.bRequestType); |
| |
| /* Set direction of EP0 */ |
| if (likely(reqtype & USB_DIR_IN)) |
| ep0->is_in = 1; |
| else |
| ep0->is_in = 0; |
| |
| /* Handle SETUP packet */ |
| req = le16_to_cpu(ctrlpkt.bRequest); |
| switch (req) { |
| case USB_REQ_CLEAR_FEATURE: |
| case USB_REQ_SET_FEATURE: |
| switch (reqtype) { |
| case (USB_TYPE_STANDARD | USB_RECIP_DEVICE): |
| if (wValue != USB_DEVICE_REMOTE_WAKEUP) |
| goto stall; /* Nothing else handled */ |
| |
| /* Tell board about event */ |
| if (req == USB_REQ_CLEAR_FEATURE) |
| udc->dev_status &= |
| ~(1 << USB_DEVICE_REMOTE_WAKEUP); |
| else |
| udc->dev_status |= |
| (1 << USB_DEVICE_REMOTE_WAKEUP); |
| uda_remwkp_cgh(udc); |
| goto zlp_send; |
| |
| case (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT): |
| tmp = wIndex & USB_ENDPOINT_NUMBER_MASK; |
| if ((wValue != USB_ENDPOINT_HALT) || |
| (tmp >= NUM_ENDPOINTS)) |
| break; |
| |
| /* Find hardware endpoint from logical endpoint */ |
| ep = &udc->ep[tmp]; |
| tmp = ep->hwep_num; |
| if (tmp == 0) |
| break; |
| |
| if (req == USB_REQ_SET_FEATURE) |
| udc_stall_hwep(udc, tmp); |
| else if (!ep->wedge) |
| udc_clrstall_hwep(udc, tmp); |
| |
| goto zlp_send; |
| |
| default: |
| break; |
| } |
| |
| |
| case USB_REQ_SET_ADDRESS: |
| if (reqtype == (USB_TYPE_STANDARD | USB_RECIP_DEVICE)) { |
| udc_set_address(udc, wValue); |
| goto zlp_send; |
| } |
| break; |
| |
| case USB_REQ_GET_STATUS: |
| udc_get_status(udc, reqtype, wIndex); |
| return; |
| |
| default: |
| break; /* Let GadgetFS handle the descriptor instead */ |
| } |
| |
| if (likely(udc->driver)) { |
| /* device-2-host (IN) or no data setup command, process |
| * immediately */ |
| spin_unlock(&udc->lock); |
| i = udc->driver->setup(&udc->gadget, &ctrlpkt); |
| |
| spin_lock(&udc->lock); |
| if (req == USB_REQ_SET_CONFIGURATION) { |
| /* Configuration is set after endpoints are realized */ |
| if (wValue) { |
| /* Set configuration */ |
| udc_set_device_configured(udc); |
| |
| udc_protocol_cmd_data_w(udc, CMD_SET_MODE, |
| DAT_WR_BYTE(AP_CLK | |
| INAK_BI | INAK_II)); |
| } else { |
| /* Clear configuration */ |
| udc_set_device_unconfigured(udc); |
| |
| /* Disable NAK interrupts */ |
| udc_protocol_cmd_data_w(udc, CMD_SET_MODE, |
| DAT_WR_BYTE(AP_CLK)); |
| } |
| } |
| |
| if (i < 0) { |
| /* setup processing failed, force stall */ |
| dev_dbg(udc->dev, |
| "req %02x.%02x protocol STALL; stat %d\n", |
| reqtype, req, i); |
| udc->ep0state = WAIT_FOR_SETUP; |
| goto stall; |
| } |
| } |
| |
| if (!ep0->is_in) |
| udc_ep0_send_zlp(udc); /* ZLP IN packet on data phase */ |
| |
| return; |
| |
| stall: |
| udc_stall_hwep(udc, EP_IN); |
| return; |
| |
| zlp_send: |
| udc_ep0_send_zlp(udc); |
| return; |
| } |
| |
| /* IN endpoint 0 transfer */ |
| static void udc_handle_ep0_in(struct lpc32xx_udc *udc) |
| { |
| struct lpc32xx_ep *ep0 = &udc->ep[0]; |
| u32 epstatus; |
| |
| /* Clear EP interrupt */ |
| epstatus = udc_clearep_getsts(udc, EP_IN); |
| |
| #ifdef CONFIG_USB_GADGET_DEBUG_FILES |
| ep0->totalints++; |
| #endif |
| |
| /* Stalled? Clear stall and reset buffers */ |
| if (epstatus & EP_SEL_ST) { |
| udc_clrstall_hwep(udc, EP_IN); |
| nuke(ep0, -ECONNABORTED); |
| udc->ep0state = WAIT_FOR_SETUP; |
| return; |
| } |
| |
| /* Is a buffer available? */ |
| if (!(epstatus & EP_SEL_F)) { |
| /* Handle based on current state */ |
| if (udc->ep0state == DATA_IN) |
| udc_ep0_in_req(udc); |
| else { |
| /* Unknown state for EP0 oe end of DATA IN phase */ |
| nuke(ep0, -ECONNABORTED); |
| udc->ep0state = WAIT_FOR_SETUP; |
| } |
| } |
| } |
| |
| /* OUT endpoint 0 transfer */ |
| static void udc_handle_ep0_out(struct lpc32xx_udc *udc) |
| { |
| struct lpc32xx_ep *ep0 = &udc->ep[0]; |
| u32 epstatus; |
| |
| /* Clear EP interrupt */ |
| epstatus = udc_clearep_getsts(udc, EP_OUT); |
| |
| |
| #ifdef CONFIG_USB_GADGET_DEBUG_FILES |
| ep0->totalints++; |
| #endif |
| |
| /* Stalled? */ |
| if (epstatus & EP_SEL_ST) { |
| udc_clrstall_hwep(udc, EP_OUT); |
| nuke(ep0, -ECONNABORTED); |
| udc->ep0state = WAIT_FOR_SETUP; |
| return; |
| } |
| |
| /* A NAK may occur if a packet couldn't be received yet */ |
| if (epstatus & EP_SEL_EPN) |
| return; |
| /* Setup packet incoming? */ |
| if (epstatus & EP_SEL_STP) { |
| nuke(ep0, 0); |
| udc->ep0state = WAIT_FOR_SETUP; |
| } |
| |
| /* Data available? */ |
| if (epstatus & EP_SEL_F) |
| /* Handle based on current state */ |
| switch (udc->ep0state) { |
| case WAIT_FOR_SETUP: |
| udc_handle_ep0_setup(udc); |
| break; |
| |
| case DATA_OUT: |
| udc_ep0_out_req(udc); |
| break; |
| |
| default: |
| /* Unknown state for EP0 */ |
| nuke(ep0, -ECONNABORTED); |
| udc->ep0state = WAIT_FOR_SETUP; |
| } |
| } |
| |
| /* Must be called without lock */ |
| static int lpc32xx_get_frame(struct usb_gadget *gadget) |
| { |
| int frame; |
| unsigned long flags; |
| struct lpc32xx_udc *udc = to_udc(gadget); |
| |
| if (!udc->clocked) |
| return -EINVAL; |
| |
| spin_lock_irqsave(&udc->lock, flags); |
| |
| frame = (int) udc_get_current_frame(udc); |
| |
| spin_unlock_irqrestore(&udc->lock, flags); |
| |
| return frame; |
| } |
| |
| static int lpc32xx_wakeup(struct usb_gadget *gadget) |
| { |
| return -ENOTSUPP; |
| } |
| |
| static int lpc32xx_set_selfpowered(struct usb_gadget *gadget, int is_on) |
| { |
| struct lpc32xx_udc *udc = to_udc(gadget); |
| |
| /* Always self-powered */ |
| udc->selfpowered = (is_on != 0); |
| |
| return 0; |
| } |
| |
| /* |
| * vbus is here! turn everything on that's ready |
| * Must be called without lock |
| */ |
| static int lpc32xx_vbus_session(struct usb_gadget *gadget, int is_active) |
| { |
| unsigned long flags; |
| struct lpc32xx_udc *udc = to_udc(gadget); |
| |
| spin_lock_irqsave(&udc->lock, flags); |
| |
| /* Doesn't need lock */ |
| if (udc->driver) { |
| udc_clk_set(udc, 1); |
| udc_enable(udc); |
| pullup(udc, is_active); |
| } else { |
| stop_activity(udc); |
| pullup(udc, 0); |
| |
| spin_unlock_irqrestore(&udc->lock, flags); |
| /* |
| * Wait for all the endpoints to disable, |
| * before disabling clocks. Don't wait if |
| * endpoints are not enabled. |
| */ |
| if (atomic_read(&udc->enabled_ep_cnt)) |
| wait_event_interruptible(udc->ep_disable_wait_queue, |
| (atomic_read(&udc->enabled_ep_cnt) == 0)); |
| |
| spin_lock_irqsave(&udc->lock, flags); |
| |
| udc_clk_set(udc, 0); |
| } |
| |
| spin_unlock_irqrestore(&udc->lock, flags); |
| |
| return 0; |
| } |
| |
| /* Can be called with or without lock */ |
| static int lpc32xx_pullup(struct usb_gadget *gadget, int is_on) |
| { |
| struct lpc32xx_udc *udc = to_udc(gadget); |
| |
| /* Doesn't need lock */ |
| pullup(udc, is_on); |
| |
| return 0; |
| } |
| |
| static int lpc32xx_start(struct usb_gadget *, struct usb_gadget_driver *); |
| static int lpc32xx_stop(struct usb_gadget *, struct usb_gadget_driver *); |
| |
| static const struct usb_gadget_ops lpc32xx_udc_ops = { |
| .get_frame = lpc32xx_get_frame, |
| .wakeup = lpc32xx_wakeup, |
| .set_selfpowered = lpc32xx_set_selfpowered, |
| .vbus_session = lpc32xx_vbus_session, |
| .pullup = lpc32xx_pullup, |
| .udc_start = lpc32xx_start, |
| .udc_stop = lpc32xx_stop, |
| }; |
| |
| static void nop_release(struct device *dev) |
| { |
| /* nothing to free */ |
| } |
| |
| static const struct lpc32xx_udc controller_template = { |
| .gadget = { |
| .ops = &lpc32xx_udc_ops, |
| .name = driver_name, |
| .dev = { |
| .init_name = "gadget", |
| .release = nop_release, |
| } |
| }, |
| .ep[0] = { |
| .ep = { |
| .name = "ep0", |
| .ops = &lpc32xx_ep_ops, |
| }, |
| .maxpacket = 64, |
| .hwep_num_base = 0, |
| .hwep_num = 0, /* Can be 0 or 1, has special handling */ |
| .lep = 0, |
| .eptype = EP_CTL_TYPE, |
| }, |
| .ep[1] = { |
| .ep = { |
| .name = "ep1-int", |
| .ops = &lpc32xx_ep_ops, |
| }, |
| .maxpacket = 64, |
| .hwep_num_base = 2, |
| .hwep_num = 0, /* 2 or 3, will be set later */ |
| .lep = 1, |
| .eptype = EP_INT_TYPE, |
| }, |
| .ep[2] = { |
| .ep = { |
| .name = "ep2-bulk", |
| .ops = &lpc32xx_ep_ops, |
| }, |
| .maxpacket = 64, |
| .hwep_num_base = 4, |
| .hwep_num = 0, /* 4 or 5, will be set later */ |
| .lep = 2, |
| .eptype = EP_BLK_TYPE, |
| }, |
| .ep[3] = { |
| .ep = { |
| .name = "ep3-iso", |
| .ops = &lpc32xx_ep_ops, |
| }, |
| .maxpacket = 1023, |
| .hwep_num_base = 6, |
| .hwep_num = 0, /* 6 or 7, will be set later */ |
| .lep = 3, |
| .eptype = EP_ISO_TYPE, |
| }, |
| .ep[4] = { |
| .ep = { |
| .name = "ep4-int", |
| .ops = &lpc32xx_ep_ops, |
| }, |
| .maxpacket = 64, |
| .hwep_num_base = 8, |
| .hwep_num = 0, /* 8 or 9, will be set later */ |
| .lep = 4, |
| .eptype = EP_INT_TYPE, |
| }, |
| .ep[5] = { |
| .ep = { |
| .name = "ep5-bulk", |
| .ops = &lpc32xx_ep_ops, |
| }, |
| .maxpacket = 64, |
| .hwep_num_base = 10, |
| .hwep_num = 0, /* 10 or 11, will be set later */ |
| .lep = 5, |
| .eptype = EP_BLK_TYPE, |
| }, |
| .ep[6] = { |
| .ep = { |
| .name = "ep6-iso", |
| .ops = &lpc32xx_ep_ops, |
| }, |
| .maxpacket = 1023, |
| .hwep_num_base = 12, |
| .hwep_num = 0, /* 12 or 13, will be set later */ |
| .lep = 6, |
| .eptype = EP_ISO_TYPE, |
| }, |
| .ep[7] = { |
| .ep = { |
| .name = "ep7-int", |
| .ops = &lpc32xx_ep_ops, |
| }, |
| .maxpacket = 64, |
| .hwep_num_base = 14, |
| .hwep_num = 0, |
| .lep = 7, |
| .eptype = EP_INT_TYPE, |
| }, |
| .ep[8] = { |
| .ep = { |
| .name = "ep8-bulk", |
| .ops = &lpc32xx_ep_ops, |
| }, |
| .maxpacket = 64, |
| .hwep_num_base = 16, |
| .hwep_num = 0, |
| .lep = 8, |
| .eptype = EP_BLK_TYPE, |
| }, |
| .ep[9] = { |
| .ep = { |
| .name = "ep9-iso", |
| .ops = &lpc32xx_ep_ops, |
| }, |
| .maxpacket = 1023, |
| .hwep_num_base = 18, |
| .hwep_num = 0, |
| .lep = 9, |
| .eptype = EP_ISO_TYPE, |
| }, |
| .ep[10] = { |
| .ep = { |
| .name = "ep10-int", |
| .ops = &lpc32xx_ep_ops, |
| }, |
| .maxpacket = 64, |
| .hwep_num_base = 20, |
| .hwep_num = 0, |
| .lep = 10, |
| .eptype = EP_INT_TYPE, |
| }, |
| .ep[11] = { |
| .ep = { |
| .name = "ep11-bulk", |
| .ops = &lpc32xx_ep_ops, |
| }, |
| .maxpacket = 64, |
| .hwep_num_base = 22, |
| .hwep_num = 0, |
| .lep = 11, |
| .eptype = EP_BLK_TYPE, |
| }, |
| .ep[12] = { |
| .ep = { |
| .name = "ep12-iso", |
| .ops = &lpc32xx_ep_ops, |
| }, |
| .maxpacket = 1023, |
| .hwep_num_base = 24, |
| .hwep_num = 0, |
| .lep = 12, |
| .eptype = EP_ISO_TYPE, |
| }, |
| .ep[13] = { |
| .ep = { |
| .name = "ep13-int", |
| .ops = &lpc32xx_ep_ops, |
| }, |
| .maxpacket = 64, |
| .hwep_num_base = 26, |
| .hwep_num = 0, |
| .lep = 13, |
| .eptype = EP_INT_TYPE, |
| }, |
| .ep[14] = { |
| .ep = { |
| .name = "ep14-bulk", |
| .ops = &lpc32xx_ep_ops, |
| }, |
| .maxpacket = 64, |
| .hwep_num_base = 28, |
| .hwep_num = 0, |
| .lep = 14, |
| .eptype = EP_BLK_TYPE, |
| }, |
| .ep[15] = { |
| .ep = { |
| .name = "ep15-bulk", |
| .ops = &lpc32xx_ep_ops, |
| }, |
| .maxpacket = 1023, |
| .hwep_num_base = 30, |
| .hwep_num = 0, |
| .lep = 15, |
| .eptype = EP_BLK_TYPE, |
| }, |
| }; |
| |
| /* ISO and status interrupts */ |
| static irqreturn_t lpc32xx_usb_lp_irq(int irq, void *_udc) |
| { |
| u32 tmp, devstat; |
| struct lpc32xx_udc *udc = _udc; |
| |
| spin_lock(&udc->lock); |
| |
| /* Read the device status register */ |
| devstat = readl(USBD_DEVINTST(udc->udp_baseaddr)); |
| |
| devstat &= ~USBD_EP_FAST; |
| writel(devstat, USBD_DEVINTCLR(udc->udp_baseaddr)); |
| devstat = devstat & udc->enabled_devints; |
| |
| /* Device specific handling needed? */ |
| if (devstat & USBD_DEV_STAT) |
| udc_handle_dev(udc); |
| |
| /* Start of frame? (devstat & FRAME_INT): |
| * The frame interrupt isn't really needed for ISO support, |
| * as the driver will queue the necessary packets */ |
| |
| /* Error? */ |
| if (devstat & ERR_INT) { |
| /* All types of errors, from cable removal during transfer to |
| * misc protocol and bit errors. These are mostly for just info, |
| * as the USB hardware will work around these. If these errors |
| * happen alot, something is wrong. */ |
| udc_protocol_cmd_w(udc, CMD_RD_ERR_STAT); |
| tmp = udc_protocol_cmd_r(udc, DAT_RD_ERR_STAT); |
| dev_dbg(udc->dev, "Device error (0x%x)!\n", tmp); |
| } |
| |
| spin_unlock(&udc->lock); |
| |
| return IRQ_HANDLED; |
| } |
| |
| /* EP interrupts */ |
| static irqreturn_t lpc32xx_usb_hp_irq(int irq, void *_udc) |
| { |
| u32 tmp; |
| struct lpc32xx_udc *udc = _udc; |
| |
| spin_lock(&udc->lock); |
| |
| /* Read the device status register */ |
| writel(USBD_EP_FAST, USBD_DEVINTCLR(udc->udp_baseaddr)); |
| |
| /* Endpoints */ |
| tmp = readl(USBD_EPINTST(udc->udp_baseaddr)); |
| |
| /* Special handling for EP0 */ |
| if (tmp & (EP_MASK_SEL(0, EP_OUT) | EP_MASK_SEL(0, EP_IN))) { |
| /* Handle EP0 IN */ |
| if (tmp & (EP_MASK_SEL(0, EP_IN))) |
| udc_handle_ep0_in(udc); |
| |
| /* Handle EP0 OUT */ |
| if (tmp & (EP_MASK_SEL(0, EP_OUT))) |
| udc_handle_ep0_out(udc); |
| } |
| |
| /* All other EPs */ |
| if (tmp & ~(EP_MASK_SEL(0, EP_OUT) | EP_MASK_SEL(0, EP_IN))) { |
| int i; |
| |
| /* Handle other EP interrupts */ |
| for (i = 1; i < NUM_ENDPOINTS; i++) { |
| if (tmp & (1 << udc->ep[i].hwep_num)) |
| udc_handle_eps(udc, &udc->ep[i]); |
| } |
| } |
| |
| spin_unlock(&udc->lock); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t lpc32xx_usb_devdma_irq(int irq, void *_udc) |
| { |
| struct lpc32xx_udc *udc = _udc; |
| |
| int i; |
| u32 tmp; |
| |
| spin_lock(&udc->lock); |
| |
| /* Handle EP DMA EOT interrupts */ |
| tmp = readl(USBD_EOTINTST(udc->udp_baseaddr)) | |
| (readl(USBD_EPDMAST(udc->udp_baseaddr)) & |
| readl(USBD_NDDRTINTST(udc->udp_baseaddr))) | |
| readl(USBD_SYSERRTINTST(udc->udp_baseaddr)); |
| for (i = 1; i < NUM_ENDPOINTS; i++) { |
| if (tmp & (1 << udc->ep[i].hwep_num)) |
| udc_handle_dma_ep(udc, &udc->ep[i]); |
| } |
| |
| spin_unlock(&udc->lock); |
| |
| return IRQ_HANDLED; |
| } |
| |
| /* |
| * |
| * VBUS detection, pullup handler, and Gadget cable state notification |
| * |
| */ |
| static void vbus_work(struct work_struct *work) |
| { |
| u8 value; |
| struct lpc32xx_udc *udc = container_of(work, struct lpc32xx_udc, |
| vbus_job); |
| |
| if (udc->enabled != 0) { |
| /* Discharge VBUS real quick */ |
| i2c_smbus_write_byte_data(udc->isp1301_i2c_client, |
| ISP1301_I2C_OTG_CONTROL_1, OTG1_VBUS_DISCHRG); |
| |
| /* Give VBUS some time (100mS) to discharge */ |
| msleep(100); |
| |
| /* Disable VBUS discharge resistor */ |
| i2c_smbus_write_byte_data(udc->isp1301_i2c_client, |
| ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR, |
| OTG1_VBUS_DISCHRG); |
| |
| /* Clear interrupt */ |
| i2c_smbus_write_byte_data(udc->isp1301_i2c_client, |
| ISP1301_I2C_INTERRUPT_LATCH | |
| ISP1301_I2C_REG_CLEAR_ADDR, ~0); |
| |
| /* Get the VBUS status from the transceiver */ |
| value = i2c_smbus_read_byte_data(udc->isp1301_i2c_client, |
| ISP1301_I2C_INTERRUPT_SOURCE); |
| |
| /* VBUS on or off? */ |
| if (value & INT_SESS_VLD) |
| udc->vbus = 1; |
| else |
| udc->vbus = 0; |
| |
| /* VBUS changed? */ |
| if (udc->last_vbus != udc->vbus) { |
| udc->last_vbus = udc->vbus; |
| lpc32xx_vbus_session(&udc->gadget, udc->vbus); |
| } |
| } |
| |
| /* Re-enable after completion */ |
| enable_irq(udc->udp_irq[IRQ_USB_ATX]); |
| } |
| |
| static irqreturn_t lpc32xx_usb_vbus_irq(int irq, void *_udc) |
| { |
| struct lpc32xx_udc *udc = _udc; |
| |
| /* Defer handling of VBUS IRQ to work queue */ |
| disable_irq_nosync(udc->udp_irq[IRQ_USB_ATX]); |
| schedule_work(&udc->vbus_job); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static int lpc32xx_start(struct usb_gadget *gadget, |
| struct usb_gadget_driver *driver) |
| { |
| struct lpc32xx_udc *udc = to_udc(gadget); |
| int i; |
| |
| if (!driver || driver->max_speed < USB_SPEED_FULL || !driver->setup) { |
| dev_err(udc->dev, "bad parameter.\n"); |
| return -EINVAL; |
| } |
| |
| if (udc->driver) { |
| dev_err(udc->dev, "UDC already has a gadget driver\n"); |
| return -EBUSY; |
| } |
| |
| udc->driver = driver; |
| udc->gadget.dev.of_node = udc->dev->of_node; |
| udc->enabled = 1; |
| udc->selfpowered = 1; |
| udc->vbus = 0; |
| |
| /* Force VBUS process once to check for cable insertion */ |
| udc->last_vbus = udc->vbus = 0; |
| schedule_work(&udc->vbus_job); |
| |
| /* Do not re-enable ATX IRQ (3) */ |
| for (i = IRQ_USB_LP; i < IRQ_USB_ATX; i++) |
| enable_irq(udc->udp_irq[i]); |
| |
| return 0; |
| } |
| |
| static int lpc32xx_stop(struct usb_gadget *gadget, |
| struct usb_gadget_driver *driver) |
| { |
| int i; |
| struct lpc32xx_udc *udc = to_udc(gadget); |
| |
| if (!driver || driver != udc->driver) |
| return -EINVAL; |
| |
| for (i = IRQ_USB_LP; i <= IRQ_USB_ATX; i++) |
| disable_irq(udc->udp_irq[i]); |
| |
| if (udc->clocked) { |
| spin_lock(&udc->lock); |
| stop_activity(udc); |
| spin_unlock(&udc->lock); |
| |
| /* |
| * Wait for all the endpoints to disable, |
| * before disabling clocks. Don't wait if |
| * endpoints are not enabled. |
| */ |
| if (atomic_read(&udc->enabled_ep_cnt)) |
| wait_event_interruptible(udc->ep_disable_wait_queue, |
| (atomic_read(&udc->enabled_ep_cnt) == 0)); |
| |
| spin_lock(&udc->lock); |
| udc_clk_set(udc, 0); |
| spin_unlock(&udc->lock); |
| } |
| |
| udc->enabled = 0; |
| udc->driver = NULL; |
| |
| return 0; |
| } |
| |
| static void lpc32xx_udc_shutdown(struct platform_device *dev) |
| { |
| /* Force disconnect on reboot */ |
| struct lpc32xx_udc *udc = platform_get_drvdata(dev); |
| |
| pullup(udc, 0); |
| } |
| |
| /* |
| * Callbacks to be overridden by options passed via OF (TODO) |
| */ |
| |
| static void lpc32xx_usbd_conn_chg(int conn) |
| { |
| /* Do nothing, it might be nice to enable an LED |
| * based on conn state being !0 */ |
| } |
| |
| static void lpc32xx_usbd_susp_chg(int susp) |
| { |
| /* Device suspend if susp != 0 */ |
| } |
| |
| static void lpc32xx_rmwkup_chg(int remote_wakup_enable) |
| { |
| /* Enable or disable USB remote wakeup */ |
| } |
| |
| struct lpc32xx_usbd_cfg lpc32xx_usbddata = { |
| .vbus_drv_pol = 0, |
| .conn_chgb = &lpc32xx_usbd_conn_chg, |
| .susp_chgb = &lpc32xx_usbd_susp_chg, |
| .rmwk_chgb = &lpc32xx_rmwkup_chg, |
| }; |
| |
| |
| static u64 lpc32xx_usbd_dmamask = ~(u32) 0x7F; |
| |
| static int __init lpc32xx_udc_probe(struct platform_device *pdev) |
| { |
| struct device *dev = &pdev->dev; |
| struct lpc32xx_udc *udc; |
| int retval, i; |
| struct resource *res; |
| dma_addr_t dma_handle; |
| struct device_node *isp1301_node; |
| |
| udc = kzalloc(sizeof(*udc), GFP_KERNEL); |
| if (!udc) |
| return -ENOMEM; |
| |
| memcpy(udc, &controller_template, sizeof(*udc)); |
| for (i = 0; i <= 15; i++) |
| udc->ep[i].udc = udc; |
| udc->gadget.ep0 = &udc->ep[0].ep; |
| |
| /* init software state */ |
| udc->gadget.dev.parent = dev; |
| udc->pdev = pdev; |
| udc->dev = &pdev->dev; |
| udc->enabled = 0; |
| |
| if (pdev->dev.of_node) { |
| isp1301_node = of_parse_phandle(pdev->dev.of_node, |
| "transceiver", 0); |
| } else { |
| isp1301_node = NULL; |
| } |
| |
| udc->isp1301_i2c_client = isp1301_get_client(isp1301_node); |
| if (!udc->isp1301_i2c_client) { |
| retval = -EPROBE_DEFER; |
| goto phy_fail; |
| } |
| |
| dev_info(udc->dev, "ISP1301 I2C device at address 0x%x\n", |
| udc->isp1301_i2c_client->addr); |
| |
| pdev->dev.dma_mask = &lpc32xx_usbd_dmamask; |
| retval = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); |
| if (retval) |
| goto resource_fail; |
| |
| udc->board = &lpc32xx_usbddata; |
| |
| /* |
| * Resources are mapped as follows: |
| * IORESOURCE_MEM, base address and size of USB space |
| * IORESOURCE_IRQ, USB device low priority interrupt number |
| * IORESOURCE_IRQ, USB device high priority interrupt number |
| * IORESOURCE_IRQ, USB device interrupt number |
| * IORESOURCE_IRQ, USB transceiver interrupt number |
| */ |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| if (!res) { |
| retval = -ENXIO; |
| goto resource_fail; |
| } |
| |
| spin_lock_init(&udc->lock); |
| |
| /* Get IRQs */ |
| for (i = 0; i < 4; i++) { |
| udc->udp_irq[i] = platform_get_irq(pdev, i); |
| if (udc->udp_irq[i] < 0) { |
| dev_err(udc->dev, |
| "irq resource %d not available!\n", i); |
| retval = udc->udp_irq[i]; |
| goto irq_fail; |
| } |
| } |
| |
| udc->io_p_start = res->start; |
| udc->io_p_size = resource_size(res); |
| if (! |