[PATCH v6 2/3] USB: gadget driver for LPC32xx

From: Roland Stigge
Date: Wed Apr 25 2012 - 04:48:48 EST

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This patch adds a USB gadget driver for the LPC32xx ARM SoC.

Signed-off-by: Roland Stigge <stigge@xxxxxxxxx>
Acked-by: Arnd Bergmann <arnd@xxxxxxxx>

---

Changes since v5:
* None

Applies to v3.4-rc3

Documentation/devicetree/bindings/usb/lpc32xx-udc.txt | 28
drivers/usb/gadget/Kconfig | 11
drivers/usb/gadget/Makefile | 1
drivers/usb/gadget/gadget_chips.h | 3
drivers/usb/gadget/lpc32xx_udc.c | 3538 ++++++++++++++++++
5 files changed, 3581 insertions(+)

--- /dev/null
+++ linux-2.6/Documentation/devicetree/bindings/usb/lpc32xx-udc.txt
@@ -0,0 +1,28 @@
+* NXP LPC32xx SoC USB Device Controller (UDC)
+
+Required properties:
+- compatible: Must be "nxp,lpc3220-udc"
+- reg: Physical base address of the controller and length of memory mapped
+ region.
+- interrupts: The USB interrupts:
+ * USB Device Low Priority Interrupt
+ * USB Device High Priority Interrupt
+ * USB Device DMA Interrupt
+ * External USB Transceiver Interrupt (OTG ATX)
+- transceiver: phandle of the associated ISP1301 device - this is necessary for
+ the UDC controller for connecting to the USB physical layer
+
+Example:
+
+ isp1301: usb-transceiver@2c {
+ compatible = "nxp,isp1301";
+ reg = <0x2c>;
+ };
+
+ usbd@31020000 {
+ compatible = "nxp,lpc3220-udc";
+ reg = <0x31020000 0x300>;
+ interrupt-parent = <&mic>;
+ interrupts = <0x3d 0>, <0x3e 0>, <0x3c 0>, <0x3a 0>;
+ transceiver = <&isp1301>;
+ };
--- linux-2.6.orig/drivers/usb/gadget/Kconfig
+++ linux-2.6/drivers/usb/gadget/Kconfig
@@ -147,6 +147,17 @@ config USB_AT91
dynamically linked module called "at91_udc" and force all
gadget drivers to also be dynamically linked.

+config USB_LPC32XX
+ tristate "LPC32XX USB Peripheral Controller"
+ depends on ARCH_LPC32XX
+ select USB_ISP1301
+ help
+ This option selects the USB device controller in the LPC32xx SoC.
+
+ Say "y" to link the driver statically, or "m" to build a
+ dynamically linked module called "lpc32xx_udc" and force all
+ gadget drivers to also be dynamically linked.
+
config USB_ATMEL_USBA
tristate "Atmel USBA"
select USB_GADGET_DUALSPEED
--- linux-2.6.orig/drivers/usb/gadget/Makefile
+++ linux-2.6/drivers/usb/gadget/Makefile
@@ -26,6 +26,7 @@ obj-$(CONFIG_USB_CI13XXX_PCI) += ci13xxx
obj-$(CONFIG_USB_S3C_HSOTG) += s3c-hsotg.o
obj-$(CONFIG_USB_S3C_HSUDC) += s3c-hsudc.o
obj-$(CONFIG_USB_LANGWELL) += langwell_udc.o
+obj-$(CONFIG_USB_LPC32XX) += lpc32xx_udc.o
obj-$(CONFIG_USB_EG20T) += pch_udc.o
obj-$(CONFIG_USB_MV_UDC) += mv_udc.o
mv_udc-y := mv_udc_core.o
--- linux-2.6.orig/drivers/usb/gadget/gadget_chips.h
+++ linux-2.6/drivers/usb/gadget/gadget_chips.h
@@ -37,6 +37,7 @@
#define gadget_is_goku(g) (!strcmp("goku_udc", (g)->name))
#define gadget_is_imx(g) (!strcmp("imx_udc", (g)->name))
#define gadget_is_langwell(g) (!strcmp("langwell_udc", (g)->name))
+#define gadget_is_lpc32xx(g) (!strcmp("lpc32xx_udc", (g)->name))
#define gadget_is_m66592(g) (!strcmp("m66592_udc", (g)->name))
#define gadget_is_musbhdrc(g) (!strcmp("musb-hdrc", (g)->name))
#define gadget_is_net2272(g) (!strcmp("net2272", (g)->name))
@@ -118,6 +119,8 @@ static inline int usb_gadget_controller_
return 0x31;
else if (gadget_is_dwc3(gadget))
return 0x32;
+ else if (gadget_is_lpc32xx(gadget))
+ return 0x33;

return -ENOENT;
}
--- /dev/null
+++ linux-2.6/drivers/usb/gadget/lpc32xx_udc.c
@@ -0,0 +1,3538 @@
+/*
+ * USB Gadget driver for LPC32xx
+ *
+ * Authors:
+ * Kevin Wells <kevin.wells@xxxxxxx>
+ * Mike James
+ * Roland Stigge <stigge@xxxxxxxxx>
+ *
+ * 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 <asm/system.h>
+
+#include <mach/platform.h>
+#include <mach/irqs.h>
+#include <mach/board.h>
+#ifdef CONFIG_USB_GADGET_DEBUG_FILES
+#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;
+
+ const struct usb_endpoint_descriptor *desc;
+};
+
+/*
+ * 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;
+
+ /* 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, see USB_OTG_CLK_CTRL()
+ * */
+#define USB_CTRL IO_ADDRESS(LPC32XX_CLK_PM_BASE + 0x64)
+#define USB_CLOCK_MASK (AHB_M_CLOCK_ON | OTG_CLOCK_ON | \
+ DEV_CLOCK_ON | I2C_CLOCK_ON)
+
+/* 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)
+
+#define USB_OTG_CLK_CTRL(udc) ((udc)->udp_baseaddr + 0xFF4)
+#define USB_OTG_CLK_STAT(udc) ((udc)->udp_baseaddr + 0xFF8)
+
+/* USB_OTG_CLK_CTRL bit defines */
+#define AHB_M_CLOCK_ON (1 << 4)
+#define OTG_CLOCK_ON (1 << 3)
+#define I2C_CLOCK_ON (1 << 2)
+#define DEV_CLOCK_ON (1 << 1)
+#define HOST_CLOCK_ON (1 << 0)
+
+#define USB_OTG_STAT_CONTROL(udc) (udc->udp_baseaddr + 0x110)
+
+/* USB_OTG_STAT_CONTROL bit defines */
+#define TRANSPARENT_I2C_EN (1 << 7)
+#define HOST_EN (1 << 0)
+
+/**********************************************************************
+ * 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) {
+ if (ep->desc)
+ 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(inode)->data);
+}
+
+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) | (1 << 22)), 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 */
+#define OTGOFF_CLK_MASK (AHB_M_CLOCK_ON | I2C_CLOCK_ON)
+static void udc_clk_set(struct lpc32xx_udc *udc, int enable)
+{
+ int to = 1000;
+
+ 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);
+
+ /* Set to enable all needed USB OTG clocks */
+ writel(USB_CLOCK_MASK, USB_OTG_CLK_CTRL(udc));
+
+ while (((readl(USB_OTG_CLK_STAT(udc)) & USB_CLOCK_MASK) !=
+ USB_CLOCK_MASK) && (to > 0))
+ to--;
+ if (!to)
+ dev_dbg(udc->dev, "Cannot enable USB OTG clocking\n");
+ } 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);
+
+ /* Enable the USB device clock */
+ writel(readl(USB_CTRL) & ~USB_DEV_NEED_CLK_EN,
+ USB_CTRL);
+
+ /* Set to enable all needed USB OTG clocks */
+ writel(OTGOFF_CLK_MASK, USB_OTG_CLK_CTRL(udc));
+
+ while (((readl(USB_OTG_CLK_STAT(udc)) &
+ OTGOFF_CLK_MASK) !=
+ OTGOFF_CLK_MASK) && (to > 0))
+ to--;
+ if (!to)
+ dev_dbg(udc->dev, "Cannot disable USB OTG clocking\n");
+ }
+}
+
+/* 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);
+ ep->desc = NULL;
+ ep->ep.maxpacket = 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) {
+ enum dma_data_direction direction;
+
+ if (ep->is_in)
+ direction = DMA_TO_DEVICE;
+ else
+ direction = DMA_FROM_DEVICE;
+
+ if (req->mapped) {
+ dma_unmap_single(ep->udc->gadget.dev.parent,
+ req->req.dma, req->req.length,
+ direction);
+ req->req.dma = 0;
+ req->mapped = 0;
+ } else
+ dma_sync_single_for_cpu(ep->udc->gadget.dev.parent,
+ req->req.dma, req->req.length,
+ direction);
+
+ /* 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 (ep->desc && 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);
+
+ /* restore the endpoint's pristine config */
+ ep->desc = NULL;
+
+ /* 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) || (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->desc = desc;
+ 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 || (!ep->desc && ep->hwep_num_base != 0)) {
+ 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) {
+ enum dma_data_direction direction;
+ struct lpc32xx_usbd_dd_gad *dd;
+
+ /* Map DMA pointer */
+ if (ep->is_in)
+ direction = DMA_TO_DEVICE;
+ else
+ direction = DMA_FROM_DEVICE;
+
+ if (req->req.dma == 0) {
+ req->req.dma = dma_map_single(
+ ep->udc->gadget.dev.parent,
+ req->req.buf, req->req.length, direction);
+ req->mapped = 1;
+ } else {
+ dma_sync_single_for_device(
+ ep->udc->gadget.dev.parent, req->req.dma,
+ req->req.length, direction);
+ req->mapped = 0;
+ }
+
+ /* 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->desc == NULL) || (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) || (tmp && !ep->desc))
+ 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_err(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_driver *driver,
+ int (*bind)(struct usb_gadget *));
+static int lpc32xx_stop(struct usb_gadget_driver *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,
+ .start = lpc32xx_start,
+ .stop = lpc32xx_stop,
+};
+
+static void nop_release(struct device *dev)
+{
+ /* nothing to free */
+}
+
+static struct lpc32xx_udc controller = {
+ .gadget = {
+ .ops = &lpc32xx_udc_ops,
+ .ep0 = &controller.ep[0].ep,
+ .name = driver_name,
+ .dev = {
+ .init_name = "gadget",
+ .release = nop_release,
+ }
+ },
+ .ep[0] = {
+ .ep = {
+ .name = "ep0",
+ .ops = &lpc32xx_ep_ops,
+ },
+ .udc = &controller,
+ .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,
+ },
+ .udc = &controller,
+ .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,
+ },
+ .udc = &controller,
+ .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,
+ },
+ .udc = &controller,
+ .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,
+ },
+ .udc = &controller,
+ .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,
+ },
+ .udc = &controller,
+ .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,
+ },
+ .udc = &controller,
+ .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,
+ },
+ .udc = &controller,
+ .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,
+ },
+ .udc = &controller,
+ .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,
+ },
+ .udc = &controller,
+ .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,
+ },
+ .udc = &controller,
+ .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,
+ },
+ .udc = &controller,
+ .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,
+ },
+ .udc = &controller,
+ .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,
+ },
+ .udc = &controller,
+ .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,
+ },
+ .udc = &controller,
+ .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,
+ },
+ .udc = &controller,
+ .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_OTG_CONTROL_2);
+
+ /* VBUS on or off? */
+ if (value & OTG_B_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_driver *driver,
+ int (*bind)(struct usb_gadget *))
+{
+ struct lpc32xx_udc *udc = &controller;
+ int retval, i;
+
+ if (!driver || driver->max_speed < USB_SPEED_FULL ||
+ !bind || !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.driver = &driver->driver;
+ udc->enabled = 1;
+ udc->selfpowered = 1;
+ udc->vbus = 0;
+
+ retval = bind(&udc->gadget);
+ if (retval) {
+ dev_err(udc->dev, "bind() returned %d\n", retval);
+ udc->enabled = 0;
+ udc->selfpowered = 0;
+ udc->driver = NULL;
+ udc->gadget.dev.driver = NULL;
+ return retval;
+ }
+
+ dev_dbg(udc->dev, "bound to %s\n", driver->driver.name);
+
+ /* 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_driver *driver)
+{
+ int i;
+ struct lpc32xx_udc *udc = &controller;
+
+ if (!driver || driver != udc->driver || !driver->unbind)
+ return -EINVAL;
+
+ /* Disable USB pullup */
+ isp1301_pullup_enable(udc, 0, 1);
+
+ 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;
+ pullup(udc, 0);
+
+ driver->unbind(&udc->gadget);
+ udc->gadget.dev.driver = NULL;
+ udc->driver = NULL;
+
+ dev_dbg(udc->dev, "unbound from %s\n", driver->driver.name);
+ return 0;
+}
+
+static void lpc32xx_udc_shutdown(struct platform_device *dev)
+{
+ /* Force disconnect on reboot */
+ struct lpc32xx_udc *udc = &controller;
+
+ 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 = &controller;
+ int retval, i;
+ struct resource *res;
+ dma_addr_t dma_handle;
+ struct device_node *isp1301_node;
+
+ /* 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)
+ return -EPROBE_DEFER;
+
+ dev_info(udc->dev, "ISP1301 I2C device at address 0x%x\n",
+ udc->isp1301_i2c_client->addr);
+
+ pdev->dev.dma_mask = &lpc32xx_usbd_dmamask;
+ pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+
+ 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)
+ return -ENXIO;
+
+ 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);
+ return udc->udp_irq[i];
+ }
+ }
+
+ udc->io_p_start = res->start;
+ udc->io_p_size = resource_size(res);
+ if (!request_mem_region(udc->io_p_start, udc->io_p_size, driver_name)) {
+ dev_err(udc->dev, "someone's using UDC memory\n");
+ return -EBUSY;
+ }
+
+ udc->udp_baseaddr = ioremap(udc->io_p_start, udc->io_p_size);
+ if (!udc->udp_baseaddr) {
+ retval = -ENOMEM;
+ dev_err(udc->dev, "IO map failure\n");
+ goto io_map_fail;
+ }
+
+ /* Enable AHB slave USB clock, needed for further USB clock control */
+ writel(USB_SLAVE_HCLK_EN | (1 << 19), USB_CTRL);
+
+ /* Get required clocks */
+ udc->usb_pll_clk = clk_get(&pdev->dev, "ck_pll5");
+ if (IS_ERR(udc->usb_pll_clk)) {
+ dev_err(udc->dev, "failed to acquire USB PLL\n");
+ retval = PTR_ERR(udc->usb_pll_clk);
+ goto pll_get_fail;
+ }
+ udc->usb_slv_clk = clk_get(&pdev->dev, "ck_usbd");
+ if (IS_ERR(udc->usb_slv_clk)) {
+ dev_err(udc->dev, "failed to acquire USB device clock\n");
+ retval = PTR_ERR(udc->usb_slv_clk);
+ goto usb_clk_get_fail;
+ }
+
+ /* Setup PLL clock to 48MHz */
+ retval = clk_enable(udc->usb_pll_clk);
+ if (retval < 0) {
+ dev_err(udc->dev, "failed to start USB PLL\n");
+ goto pll_enable_fail;
+ }
+
+ retval = clk_set_rate(udc->usb_pll_clk, 48000);
+ if (retval < 0) {
+ dev_err(udc->dev, "failed to set USB clock rate\n");
+ goto pll_set_fail;
+ }
+
+ writel(readl(USB_CTRL) | USB_DEV_NEED_CLK_EN, USB_CTRL);
+
+ /* Enable USB device clock */
+ retval = clk_enable(udc->usb_slv_clk);
+ if (retval < 0) {
+ dev_err(udc->dev, "failed to start USB device clock\n");
+ goto usb_clk_enable_fail;
+ }
+
+ /* Set to enable all needed USB OTG clocks */
+ writel(USB_CLOCK_MASK, USB_OTG_CLK_CTRL(udc));
+
+ i = 1000;
+ while (((readl(USB_OTG_CLK_STAT(udc)) & USB_CLOCK_MASK) !=
+ USB_CLOCK_MASK) && (i > 0))
+ i--;
+ if (!i)
+ dev_dbg(udc->dev, "USB OTG clocks not correctly enabled\n");
+
+ /* Setup deferred workqueue data */
+ udc->poweron = udc->pullup = 0;
+ INIT_WORK(&udc->pullup_job, pullup_work);
+ INIT_WORK(&udc->vbus_job, vbus_work);
+#ifdef CONFIG_PM
+ INIT_WORK(&udc->power_job, power_work);
+#endif
+
+ /* All clocks are now on */
+ udc->clocked = 1;
+
+ isp1301_udc_configure(udc);
+ /* Allocate memory for the UDCA */
+ udc->udca_v_base = dma_alloc_coherent(&pdev->dev, UDCA_BUFF_SIZE,
+ &dma_handle,
+ (GFP_KERNEL | GFP_DMA));
+ if (!udc->udca_v_base) {
+ dev_err(udc->dev, "error getting UDCA region\n");
+ retval = -ENOMEM;
+ goto i2c_fail;
+ }
+ udc->udca_p_base = dma_handle;
+ dev_dbg(udc->dev, "DMA buffer(0x%x bytes), P:0x%08x, V:0x%p\n",
+ UDCA_BUFF_SIZE, udc->udca_p_base, udc->udca_v_base);
+
+ /* Setup the DD DMA memory pool */
+ udc->dd_cache = dma_pool_create("udc_dd", udc->dev,
+ sizeof(struct lpc32xx_usbd_dd_gad),
+ sizeof(u32), 0);
+ if (!udc->dd_cache) {
+ dev_err(udc->dev, "error getting DD DMA region\n");
+ retval = -ENOMEM;
+ goto dma_alloc_fail;
+ }
+
+ /* Clear USB peripheral and initialize gadget endpoints */
+ udc_disable(udc);
+ udc_reinit(udc);
+
+ retval = device_register(&udc->gadget.dev);
+ if (retval < 0) {
+ dev_err(udc->dev, "Device registration failure\n");
+ goto dev_register_fail;
+ }
+
+ /* Request IRQs - low and high priority USB device IRQs are routed to
+ * the same handler, while the DMA interrupt is routed elsewhere */
+ retval = request_irq(udc->udp_irq[IRQ_USB_LP], lpc32xx_usb_lp_irq,
+ 0, "udc_lp", udc);
+ if (retval < 0) {
+ dev_err(udc->dev, "LP request irq %d failed\n",
+ udc->udp_irq[IRQ_USB_LP]);
+ goto irq_lp_fail;
+ }
+ retval = request_irq(udc->udp_irq[IRQ_USB_HP], lpc32xx_usb_hp_irq,
+ 0, "udc_hp", udc);
+ if (retval < 0) {
+ dev_err(udc->dev, "HP request irq %d failed\n",
+ udc->udp_irq[IRQ_USB_HP]);
+ goto irq_hp_fail;
+ }
+
+ retval = request_irq(udc->udp_irq[IRQ_USB_DEVDMA],
+ lpc32xx_usb_devdma_irq, 0, "udc_dma", udc);
+ if (retval < 0) {
+ dev_err(udc->dev, "DEV request irq %d failed\n",
+ udc->udp_irq[IRQ_USB_DEVDMA]);
+ goto irq_dev_fail;
+ }
+
+ /* The transceiver interrupt is used for VBUS detection and will
+ kick off the VBUS handler function */
+ retval = request_irq(udc->udp_irq[IRQ_USB_ATX], lpc32xx_usb_vbus_irq,
+ 0, "udc_otg", udc);
+ if (retval < 0) {
+ dev_err(udc->dev, "VBUS request irq %d failed\n",
+ udc->udp_irq[IRQ_USB_ATX]);
+ goto irq_xcvr_fail;
+ }
+
+ /* Initialize wait queue */
+ init_waitqueue_head(&udc->ep_disable_wait_queue);
+ atomic_set(&udc->enabled_ep_cnt, 0);
+
+ /* Keep all IRQs disabled until GadgetFS starts up */
+ for (i = IRQ_USB_LP; i <= IRQ_USB_ATX; i++)
+ disable_irq(udc->udp_irq[i]);
+
+ retval = usb_add_gadget_udc(dev, &udc->gadget);
+ if (retval < 0)
+ goto add_gadget_fail;
+
+ dev_set_drvdata(dev, udc);
+ device_init_wakeup(dev, 1);
+ create_debug_file(udc);
+
+ /* Disable clocks for now */
+ udc_clk_set(udc, 0);
+
+ dev_info(udc->dev, "%s version %s\n", driver_name, DRIVER_VERSION);
+ return 0;
+
+add_gadget_fail:
+ free_irq(udc->udp_irq[IRQ_USB_ATX], udc);
+irq_xcvr_fail:
+ free_irq(udc->udp_irq[IRQ_USB_DEVDMA], udc);
+irq_dev_fail:
+ free_irq(udc->udp_irq[IRQ_USB_HP], udc);
+irq_hp_fail:
+ free_irq(udc->udp_irq[IRQ_USB_LP], udc);
+irq_lp_fail:
+ device_unregister(&udc->gadget.dev);
+dev_register_fail:
+ dma_pool_destroy(udc->dd_cache);
+dma_alloc_fail:
+ dma_free_coherent(&pdev->dev, UDCA_BUFF_SIZE,
+ udc->udca_v_base, udc->udca_p_base);
+i2c_fail:
+ clk_disable(udc->usb_slv_clk);
+usb_clk_enable_fail:
+pll_set_fail:
+ clk_disable(udc->usb_pll_clk);
+pll_enable_fail:
+ clk_put(udc->usb_slv_clk);
+usb_clk_get_fail:
+ clk_put(udc->usb_pll_clk);
+pll_get_fail:
+ iounmap(udc->udp_baseaddr);
+io_map_fail:
+ release_mem_region(udc->io_p_start, udc->io_p_size);
+ dev_err(udc->dev, "%s probe failed, %d\n", driver_name, retval);
+
+ return retval;
+}
+
+static int __devexit lpc32xx_udc_remove(struct platform_device *pdev)
+{
+ struct lpc32xx_udc *udc = platform_get_drvdata(pdev);
+
+ usb_del_gadget_udc(&udc->gadget);
+ if (udc->driver)
+ return -EBUSY;
+
+ udc_clk_set(udc, 1);
+ udc_disable(udc);
+ pullup(udc, 0);
+
+ free_irq(udc->udp_irq[IRQ_USB_ATX], udc);
+
+ device_init_wakeup(&pdev->dev, 0);
+ remove_debug_file(udc);
+
+ dma_pool_destroy(udc->dd_cache);
+ dma_free_coherent(&pdev->dev, UDCA_BUFF_SIZE,
+ udc->udca_v_base, udc->udca_p_base);
+ free_irq(udc->udp_irq[IRQ_USB_DEVDMA], udc);
+ free_irq(udc->udp_irq[IRQ_USB_HP], udc);
+ free_irq(udc->udp_irq[IRQ_USB_LP], udc);
+
+ device_unregister(&udc->gadget.dev);
+
+ clk_disable(udc->usb_slv_clk);
+ clk_put(udc->usb_slv_clk);
+ clk_disable(udc->usb_pll_clk);
+ clk_put(udc->usb_pll_clk);
+ iounmap(udc->udp_baseaddr);
+ release_mem_region(udc->io_p_start, udc->io_p_size);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int lpc32xx_udc_suspend(struct platform_device *pdev, pm_message_t mesg)
+{
+ int to = 1000;
+ struct lpc32xx_udc *udc = platform_get_drvdata(pdev);
+
+ if (udc->clocked) {
+ /* Power down ISP */
+ udc->poweron = 0;
+ isp1301_set_powerstate(udc, 0);
+
+ /* Disable clocking */
+ udc_clk_set(udc, 0);
+
+ /* Keep clock flag on, so we know to re-enable clocks
+ on resume */
+ udc->clocked = 1;
+
+ /* Kill OTG and I2C clocks */
+ writel(0, USB_OTG_CLK_CTRL(udc));
+ while (((readl(USB_OTG_CLK_STAT(udc)) & OTGOFF_CLK_MASK) !=
+ OTGOFF_CLK_MASK) && (to > 0))
+ to--;
+ if (!to)
+ dev_dbg(udc->dev,
+ "USB OTG clocks not correctly enabled\n");
+
+ /* Kill global USB clock */
+ clk_disable(udc->usb_slv_clk);
+ }
+
+ return 0;
+}
+
+static int lpc32xx_udc_resume(struct platform_device *pdev)
+{
+ struct lpc32xx_udc *udc = platform_get_drvdata(pdev);
+
+ if (udc->clocked) {
+ /* Enable global USB clock */
+ clk_enable(udc->usb_slv_clk);
+
+ /* Enable clocking */
+ udc_clk_set(udc, 1);
+
+ /* ISP back to normal power mode */
+ udc->poweron = 1;
+ isp1301_set_powerstate(udc, 1);
+ }
+
+ return 0;
+}
+#else
+#define lpc32xx_udc_suspend NULL
+#define lpc32xx_udc_resume NULL
+#endif
+
+#ifdef CONFIG_OF
+static struct of_device_id lpc32xx_udc_of_match[] = {
+ { .compatible = "nxp,lpc3220-udc", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, lpc32xx_udc_of_match);
+#endif
+
+static struct platform_driver lpc32xx_udc_driver = {
+ .remove = __devexit_p(lpc32xx_udc_remove),
+ .shutdown = lpc32xx_udc_shutdown,
+ .suspend = lpc32xx_udc_suspend,
+ .resume = lpc32xx_udc_resume,
+ .driver = {
+ .name = (char *) driver_name,
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(lpc32xx_udc_of_match),
+ },
+};
+
+static int __init udc_init_module(void)
+{
+ return platform_driver_probe(&lpc32xx_udc_driver, lpc32xx_udc_probe);
+}
+module_init(udc_init_module);
+
+static void __exit udc_exit_module(void)
+{
+ platform_driver_unregister(&lpc32xx_udc_driver);
+}
+module_exit(udc_exit_module);
+
+MODULE_DESCRIPTION("LPC32XX udc driver");
+MODULE_AUTHOR("Kevin Wells <kevin.wells@xxxxxxx>");
+MODULE_AUTHOR("Roland Stigge <stigge@xxxxxxxxx>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:lpc32xx_udc");
--
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