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authorPeng Fan <Peng.Fan@freescale.com>2015-03-10 15:05:10 +0800
committerPeng Fan <Peng.Fan@freescale.com>2015-04-29 15:00:32 +0800
commiteefcd91b30a0ee7ae2f0f3d03d4f4e667374443b (patch)
treed79e3b140ff257a3da4a39e028e32e7d46c65f52 /drivers/usb
parentb7f153c8b55c4ccccf792de9dd63ece243c72435 (diff)
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MLK-10774-33 imx:mx6 add udc and fastboot support
Add udc and fastboot support We did not use the upstream way. Currently use CI_UDC and USB_GAGDET of upstream can make fastboot work, but lack of flash operation, so we still use our way. Signed-off-by: Peng Fan <Peng.Fan@freescale.com> Signed-off-by: Nitin Garg <nitin.garg@freescale.com> Signed-off-by: Ye.Li <B37916@freescale.com>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/gadget/Makefile1
-rw-r--r--drivers/usb/gadget/imx_udc.c1190
2 files changed, 1191 insertions, 0 deletions
diff --git a/drivers/usb/gadget/Makefile b/drivers/usb/gadget/Makefile
index 70bb550..4869867 100644
--- a/drivers/usb/gadget/Makefile
+++ b/drivers/usb/gadget/Makefile
@@ -34,5 +34,6 @@ obj-y += ep0.o
obj-$(CONFIG_DW_UDC) += designware_udc.o
obj-$(CONFIG_MPC885_FAMILY) += mpc8xx_udc.o
obj-$(CONFIG_CPU_PXA27X) += pxa27x_udc.o
+obj-$(CONFIG_IMX_UDC) += imx_udc.o
endif
endif
diff --git a/drivers/usb/gadget/imx_udc.c b/drivers/usb/gadget/imx_udc.c
new file mode 100644
index 0000000..9371ef5
--- /dev/null
+++ b/drivers/usb/gadget/imx_udc.c
@@ -0,0 +1,1190 @@
+/*
+ * Copyright (C) 2010-2014 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/types.h>
+#include <malloc.h>
+#include <command.h>
+#include <asm/errno.h>
+#include <usbdevice.h>
+#include <usb/imx_udc.h>
+
+#include "ep0.h"
+
+#ifdef DEBUG
+#define DBG(x...) printf(x)
+#else
+#define DBG(x...) do {} while (0)
+#endif
+
+#define mdelay(n) udelay((n)*1000)
+
+#define EP_TQ_ITEM_SIZE 16
+
+#define inc_index(x) (x = ((x+1) % EP_TQ_ITEM_SIZE))
+
+#define ep_is_in(e, tx) ((e == 0) ? (mxc_udc.ep0_dir == USB_DIR_IN) : tx)
+
+#define USB_RECIP_MASK 0x03
+#define USB_TYPE_MASK (0x03 << 5)
+#define USB_MEM_ALIGN_BYTE 4096
+#define USB_DEV_DQH_ALIGN 64
+#define USB_DEV_DTD_ALIGN 64
+
+/*fixed the dtd buffer to 4096 bytes, even it could be 20KB*/
+#define USB_DEV_DTD_MAX_BUFFER_SIZE 4096
+
+#define CACHE_ALIGNED_END(start, length) \
+ (ALIGN((uint32_t)start + length, ARCH_DMA_MINALIGN))
+
+struct mxc_ep_t{
+ int epnum;
+ int dir;
+ /* change from int to u32 to make `min` happy */
+ u32 max_pkt_size;
+ struct usb_endpoint_instance *epi;
+ struct ep_queue_item *ep_dtd[EP_TQ_ITEM_SIZE];
+ int index; /* to index the free tx tqi */
+ int done; /* to index the complete rx tqi */
+ struct ep_queue_item *tail; /* last item in the dtd chain */
+ struct ep_queue_head *ep_qh;
+} ;
+
+struct mxc_udc_ctrl{
+ int max_ep;
+ int ep0_dir;
+ int setaddr;
+ struct ep_queue_head *ep_qh;
+ struct mxc_ep_t *mxc_ep;
+ u32 qh_unaligned;
+};
+
+static int usb_highspeed;
+static int usb_inited;
+static struct mxc_udc_ctrl mxc_udc;
+static struct usb_device_instance *udc_device;
+static struct urb *ep0_urb;
+/*
+ * malloc an aligned memory
+ * unaligned_addr: return a unaligned address for memory free
+ * size : memory size
+ * align : alignment for this memroy
+ * return : aligned address(NULL when malloc failt)
+*/
+static void *malloc_aligned_buffer(u32 *unaligned_addr,
+ int size, int align)
+{
+ int msize = (size + align - 1);
+ u32 vir, vir_align;
+
+ /* force the allocated memory size to be aligned with min cache operation unit.
+ * So it is safe to flush/invalidate the cache.
+ */
+ msize = (msize + ARCH_DMA_MINALIGN - 1) / ARCH_DMA_MINALIGN;
+ msize = msize * ARCH_DMA_MINALIGN;
+
+ vir = (u32)malloc(msize);
+ memset((void *)vir, 0, msize);
+ vir_align = (vir + align - 1) & (~(align - 1));
+ *unaligned_addr = vir;
+
+ DBG("alloc aligned vir addr %x\n", vir_align);
+ return (void *)vir_align;
+}
+
+int is_usb_disconnected()
+{
+ int ret = 0;
+
+ ret = readl(USB_OTGSC) & OTGSC_B_SESSION_VALID ? 0 : 1;
+ return ret;
+}
+
+static int mxc_init_usb_qh(void)
+{
+ int size;
+ memset(&mxc_udc, 0, sizeof(mxc_udc));
+ mxc_udc.max_ep = (readl(USB_DCCPARAMS) & DCCPARAMS_DEN_MASK) * 2;
+ DBG("udc max ep = %d\n", mxc_udc.max_ep);
+ size = mxc_udc.max_ep * sizeof(struct ep_queue_head);
+ mxc_udc.ep_qh = malloc_aligned_buffer(&mxc_udc.qh_unaligned,
+ size, USB_MEM_ALIGN_BYTE);
+ if (!mxc_udc.ep_qh) {
+ printf("malloc ep qh dma buffer failure\n");
+ return -1;
+ }
+ memset(mxc_udc.ep_qh, 0, size);
+
+ /*flush cache to physical memory*/
+ flush_dcache_range((unsigned long)mxc_udc.ep_qh,
+ CACHE_ALIGNED_END(mxc_udc.ep_qh, size));
+
+ writel(virt_to_phys(mxc_udc.ep_qh) & 0xfffff800, USB_ENDPOINTLISTADDR);
+ return 0;
+}
+
+static int mxc_destroy_usb_qh(void)
+{
+ if (mxc_udc.ep_qh && mxc_udc.qh_unaligned) {
+ free((void *)mxc_udc.qh_unaligned);
+ mxc_udc.ep_qh = 0;
+ mxc_udc.qh_unaligned = 0;
+ mxc_udc.max_ep = 0;
+ }
+
+ return 0;
+}
+
+static int mxc_init_ep_struct(void)
+{
+ int i;
+
+ DBG("init mxc ep\n");
+ mxc_udc.mxc_ep = malloc(mxc_udc.max_ep * sizeof(struct mxc_ep_t));
+ if (!mxc_udc.mxc_ep) {
+ printf("malloc ep struct failure\n");
+ return -1;
+ }
+ memset((void *)mxc_udc.mxc_ep, 0,
+ sizeof(struct mxc_ep_t) * mxc_udc.max_ep);
+ for (i = 0; i < mxc_udc.max_ep / 2; i++) {
+ struct mxc_ep_t *ep;
+ ep = mxc_udc.mxc_ep + i * 2;
+ ep->epnum = i;
+ ep->index = ep->done = 0;
+ ep->dir = USB_RECV; /* data from host to device */
+ ep->ep_qh = &mxc_udc.ep_qh[i * 2];
+
+ ep = mxc_udc.mxc_ep + (i * 2 + 1);
+ ep->epnum = i;
+ ep->index = ep->done = 0;
+ ep->dir = USB_SEND; /* data to host from device */
+ ep->ep_qh = &mxc_udc.ep_qh[(i * 2 + 1)];
+ }
+ return 0;
+}
+
+static int mxc_destroy_ep_struct(void)
+{
+ if (mxc_udc.mxc_ep) {
+ free(mxc_udc.mxc_ep);
+ mxc_udc.mxc_ep = 0;
+ }
+ return 0;
+}
+
+static int mxc_init_ep_dtd(u8 index)
+{
+ struct mxc_ep_t *ep;
+ u32 unaligned_addr;
+ int i;
+
+ if (index >= mxc_udc.max_ep)
+ DBG("%s ep %d is not valid\n", __func__, index);
+
+ ep = mxc_udc.mxc_ep + index;
+ for (i = 0; i < EP_TQ_ITEM_SIZE; i++) {
+ ep->ep_dtd[i] = malloc_aligned_buffer(&unaligned_addr,
+ sizeof(struct ep_queue_item), USB_DEV_DTD_ALIGN);
+ ep->ep_dtd[i]->item_unaligned_addr = unaligned_addr;
+
+ if (NULL == ep->ep_dtd[i]) {
+ printf("%s malloc tq item failure\n", __func__);
+
+ /*free other already allocated dtd*/
+ while (i) {
+ i--;
+ free((void *)(ep->ep_dtd[i]->item_unaligned_addr));
+ ep->ep_dtd[i] = 0;
+ }
+ return -1;
+ }
+ }
+ return 0;
+}
+
+static int mxc_destroy_ep_dtd(u8 index)
+{
+ struct mxc_ep_t *ep;
+ int i;
+
+ if (index >= mxc_udc.max_ep)
+ DBG("%s ep %d is not valid\n", __func__, index);
+
+ ep = mxc_udc.mxc_ep + index;
+ for (i = 0; i < EP_TQ_ITEM_SIZE; i++) {
+ if (ep->ep_dtd[i]) {
+ free((void *)(ep->ep_dtd[i]->item_unaligned_addr));
+ ep->ep_dtd[i] = 0;
+ }
+ }
+
+ return 0;
+}
+
+static void mxc_ep_qh_setup(u8 ep_num, u8 dir, u8 ep_type,
+ u32 max_pkt_len, u32 zlt, u8 mult)
+{
+ struct ep_queue_head *p_qh = mxc_udc.ep_qh + (2 * ep_num + dir);
+ u32 tmp = 0;
+
+ tmp = max_pkt_len << 16;
+ switch (ep_type) {
+ case USB_ENDPOINT_XFER_CONTROL:
+ tmp |= (1 << 15);
+ break;
+ case USB_ENDPOINT_XFER_ISOC:
+ tmp |= (mult << 30);
+ break;
+ case USB_ENDPOINT_XFER_BULK:
+ case USB_ENDPOINT_XFER_INT:
+ break;
+ default:
+ DBG("error ep type is %d\n", ep_type);
+ return;
+ }
+ if (zlt)
+ tmp |= (1<<29);
+
+ p_qh->config = tmp;
+
+ /*flush qh's config field to physical memory*/
+ flush_dcache_range((unsigned long)p_qh,
+ CACHE_ALIGNED_END(p_qh, sizeof(struct ep_queue_head)));
+}
+
+static void mxc_ep_setup(u8 ep_num, u8 dir, u8 ep_type)
+{
+ u32 epctrl = 0;
+ epctrl = readl(USB_ENDPTCTRL(ep_num));
+ if (dir) {
+ if (ep_num)
+ epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
+ epctrl |= EPCTRL_TX_ENABLE;
+ epctrl |= ((u32)(ep_type) << EPCTRL_TX_EP_TYPE_SHIFT);
+ } else {
+ if (ep_num)
+ epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
+ epctrl |= EPCTRL_RX_ENABLE;
+ epctrl |= ((u32)(ep_type) << EPCTRL_RX_EP_TYPE_SHIFT);
+ }
+ writel(epctrl, USB_ENDPTCTRL(ep_num));
+}
+
+static void mxc_ep_destroy(u8 ep_num, u8 dir)
+{
+ u32 epctrl = 0;
+ epctrl = readl(USB_ENDPTCTRL(ep_num));
+ if (dir)
+ epctrl &= ~EPCTRL_TX_ENABLE;
+ else
+ epctrl &= ~EPCTRL_RX_ENABLE;
+
+ writel(epctrl, USB_ENDPTCTRL(ep_num));
+}
+
+
+static void mxc_tqi_init_page(struct ep_queue_item *tqi)
+{
+ tqi->page0 = virt_to_phys((void *)(tqi->page_vir));
+ tqi->page1 = tqi->page0 + 0x1000;
+ tqi->page2 = tqi->page1 + 0x1000;
+ tqi->page3 = tqi->page2 + 0x1000;
+ tqi->page4 = tqi->page3 + 0x1000;
+}
+
+static int mxc_malloc_ep0_ptr(struct mxc_ep_t *ep)
+{
+ int i;
+ struct ep_queue_item *tqi;
+ int max_pkt_size = USB_MAX_CTRL_PAYLOAD;
+
+ ep->max_pkt_size = max_pkt_size;
+ for (i = 0; i < EP_TQ_ITEM_SIZE; i++) {
+ tqi = ep->ep_dtd[i];
+ tqi->page_vir = (u32)malloc_aligned_buffer(&tqi->page_unaligned,
+ max_pkt_size,
+ USB_MEM_ALIGN_BYTE);
+ if ((void *)tqi->page_vir == NULL) {
+ printf("malloc ep's dtd bufer failure, i=%d\n", i);
+ return -1;
+ }
+ mxc_tqi_init_page(tqi);
+
+ /*flush dtd's config field to physical memory*/
+ flush_dcache_range((unsigned long)tqi,
+ CACHE_ALIGNED_END(tqi, sizeof(struct ep_queue_item)));
+ }
+ return 0;
+}
+
+static int mxc_free_ep0_ptr(struct mxc_ep_t *ep)
+{
+ int i;
+ struct ep_queue_item *tqi;
+ for (i = 0; i < EP_TQ_ITEM_SIZE; i++) {
+ tqi = ep->ep_dtd[i];
+ if (tqi->page_vir) {
+ free((void *)(tqi->page_unaligned));
+ tqi->page_vir = 0;
+ tqi->page_unaligned = 0;
+ tqi->page0 = 0;
+ tqi->page1 = 0;
+ tqi->page2 = 0;
+ tqi->page3 = 0;
+ tqi->page4 = 0;
+
+ /*flush dtd's config field to physical memory*/
+ flush_dcache_range((unsigned long)tqi,
+ CACHE_ALIGNED_END(tqi, sizeof(struct ep_queue_item)));
+ }
+ }
+
+ return 0;
+}
+
+static void ep0_setup(void)
+{
+ mxc_ep_qh_setup(0, USB_RECV, USB_ENDPOINT_XFER_CONTROL,
+ USB_MAX_CTRL_PAYLOAD, 0, 0);
+ mxc_ep_qh_setup(0, USB_SEND, USB_ENDPOINT_XFER_CONTROL,
+ USB_MAX_CTRL_PAYLOAD, 0, 0);
+ mxc_ep_setup(0, USB_RECV, USB_ENDPOINT_XFER_CONTROL);
+ mxc_ep_setup(0, USB_SEND, USB_ENDPOINT_XFER_CONTROL);
+ mxc_init_ep_dtd(0 * 2 + USB_RECV);
+ mxc_init_ep_dtd(0 * 2 + USB_SEND);
+ mxc_malloc_ep0_ptr(mxc_udc.mxc_ep + (USB_RECV));
+ mxc_malloc_ep0_ptr(mxc_udc.mxc_ep + (USB_SEND));
+}
+
+static void ep0_destroy(void)
+{
+ mxc_ep_destroy(0, USB_RECV);
+ mxc_ep_destroy(0, USB_SEND);
+ mxc_free_ep0_ptr(mxc_udc.mxc_ep + (USB_RECV));
+ mxc_free_ep0_ptr(mxc_udc.mxc_ep + (USB_SEND));
+ mxc_destroy_ep_dtd(0 * 2 + USB_RECV);
+ mxc_destroy_ep_dtd(0 * 2 + USB_SEND);
+}
+
+static int mxc_tqi_is_busy(struct ep_queue_item *tqi)
+{
+ /* bit 7 is set by software when send, clear by controller
+ when finish */
+ /*Invalidate cache to gain dtd content from physical memory*/
+ invalidate_dcache_range((unsigned long)tqi,
+ CACHE_ALIGNED_END(tqi, sizeof(struct ep_queue_item)));
+ return tqi->info & (1 << 7);
+}
+
+static int mxc_ep_xfer_is_working(struct mxc_ep_t *ep, u32 in)
+{
+ /* in: means device -> host */
+ u32 bitmask = 1 << (ep->epnum + in * 16);
+ u32 temp, prime, tstat;
+
+ prime = (bitmask & readl(USB_ENDPTPRIME));
+ if (prime)
+ return 1;
+ do {
+ temp = readl(USB_USBCMD);
+ writel(temp|USB_CMD_ATDTW, USB_USBCMD);
+ tstat = readl(USB_ENDPTSTAT) & bitmask;
+ } while (!(readl(USB_USBCMD) & USB_CMD_ATDTW));
+ writel(temp & (~USB_CMD_ATDTW), USB_USBCMD);
+
+ if (tstat)
+ return 1;
+ return 0;
+}
+
+static void mxc_update_qh(struct mxc_ep_t *ep,
+ struct ep_queue_item *tqi, u32 in)
+{
+ /* in: means device -> host */
+ struct ep_queue_head *qh = ep->ep_qh;
+ u32 bitmask = 1 << (ep->epnum + in * 16);
+ DBG("%s, line %d, epnum=%d, in=%d\n", __func__,
+ __LINE__, ep->epnum, in);
+ qh->next_queue_item = virt_to_phys(tqi);
+ qh->info = 0;
+
+ /*flush qh''s config field to physical memory*/
+ flush_dcache_range((unsigned long)qh,
+ CACHE_ALIGNED_END(qh, sizeof(struct ep_queue_head)));
+
+ writel(bitmask, USB_ENDPTPRIME);
+}
+
+static void _dump_buf(u8 *buf, u32 len)
+{
+#ifdef DEBUG
+ char *data = (char *)buf;
+ int i;
+ for (i = 0; i < len; i++) {
+ printf("0x%02x ", data[i]);
+ if (i%16 == 15)
+ printf("\n");
+ }
+ printf("\n");
+#endif
+}
+
+static void mxc_udc_queue_update(u8 epnum,
+ u8 *data, u32 len, u32 tx)
+{
+ struct mxc_ep_t *ep;
+ struct ep_queue_item *tqi, *head, *last;
+ int send = 0;
+ int in;
+
+ head = last = NULL;
+ in = ep_is_in(epnum, tx);
+ ep = mxc_udc.mxc_ep + (epnum * 2 + in);
+ DBG("epnum = %d, in = %d\n", epnum, in);
+ do {
+ tqi = ep->ep_dtd[ep->index];
+ DBG("%s, index = %d, tqi = %p\n", __func__, ep->index, tqi);
+ while (mxc_tqi_is_busy(tqi))
+ ;
+ mxc_tqi_init_page(tqi);
+ DBG("%s, line = %d, len = %d\n", __func__, __LINE__, len);
+ inc_index(ep->index);
+ send = min(len, ep->max_pkt_size);
+ if (data) {
+ memcpy((void *)tqi->page_vir, (void *)data, send);
+ _dump_buf((u8 *)(tqi->page_vir), send);
+
+ flush_dcache_range((unsigned long)(tqi->page_vir),
+ CACHE_ALIGNED_END(tqi->page_vir, send));
+ }
+ if (!head)
+ last = head = tqi;
+ else {
+ last->next_item_ptr = virt_to_phys(tqi);
+ last->next_item_vir = tqi;
+ last = tqi;
+ }
+ if (!tx)
+ tqi->reserved[0] = send;
+ /* we set IOC for every dtd */
+ tqi->info = ((send << 16) | (1 << 15) | (1 << 7));
+ data += send;
+ len -= send;
+
+ flush_dcache_range((unsigned long)tqi,
+ CACHE_ALIGNED_END(tqi, sizeof(struct ep_queue_item)));
+ } while (len);
+
+ last->next_item_ptr = 0x1; /* end */
+ flush_dcache_range((unsigned long)last,
+ CACHE_ALIGNED_END(last, sizeof(struct ep_queue_item)));
+
+ if (ep->tail) {
+ ep->tail->next_item_ptr = virt_to_phys(head);
+ ep->tail->next_item_vir = head;
+ flush_dcache_range((unsigned long)(ep->tail),
+ CACHE_ALIGNED_END(ep->tail, sizeof(struct ep_queue_item)));
+
+ if (mxc_ep_xfer_is_working(ep, in)) {
+ DBG("ep is working\n");
+ goto out;
+ }
+ }
+ mxc_update_qh(ep, head, in);
+out:
+ ep->tail = last;
+}
+
+static void mxc_udc_txqueue_update(u8 ep, u8 *data, u32 len)
+{
+ printf("[SEND DATA] EP= %d, Len = 0x%x\n", ep, len);
+ _dump_buf(data, len);
+ mxc_udc_queue_update(ep, data, len, 1);
+}
+
+void mxc_udc_rxqueue_update(u8 ep, u32 len)
+{
+ mxc_udc_queue_update(ep, NULL, len, 0);
+}
+
+static void mxc_ep0_stall(void)
+{
+ u32 temp;
+ temp = readl(USB_ENDPTCTRL(0));
+ temp |= EPCTRL_TX_EP_STALL | EPCTRL_RX_EP_STALL;
+ writel(temp, USB_ENDPTCTRL(0));
+}
+
+static void mxc_usb_run(void)
+{
+ unsigned int temp = 0;
+
+ /* Enable DR irq reg */
+ temp = USB_INTR_INT_EN | USB_INTR_ERR_INT_EN
+ | USB_INTR_PTC_DETECT_EN | USB_INTR_RESET_EN
+ | USB_INTR_DEVICE_SUSPEND | USB_INTR_SYS_ERR_EN;
+
+ writel(temp, USB_USBINTR);
+
+ /* Set controller to Run */
+ temp = readl(USB_USBCMD);
+ temp |= USB_CMD_RUN_STOP;
+ writel(temp, USB_USBCMD);
+}
+
+static void mxc_usb_stop(void)
+{
+ unsigned int temp = 0;
+
+ writel(temp, USB_USBINTR);
+
+ /* Set controller to Stop */
+ temp = readl(USB_USBCMD);
+ temp &= ~USB_CMD_RUN_STOP;
+ writel(temp, USB_USBCMD);
+}
+
+static void usb_phy_init(void)
+{
+ u32 temp;
+ /* select 24M clk */
+ temp = readl(USB_PHY1_CTRL);
+ temp &= ~3;
+ temp |= 1;
+ writel(temp, USB_PHY1_CTRL);
+ /* Config PHY interface */
+ temp = readl(USB_PORTSC1);
+ temp &= ~(PORTSCX_PHY_TYPE_SEL | PORTSCX_PORT_WIDTH);
+ temp |= PORTSCX_PTW_16BIT;
+ writel(temp, USB_PORTSC1);
+ DBG("Config PHY END\n");
+}
+
+static void usb_set_mode_device(void)
+{
+ u32 temp;
+
+ /* Set controller to stop */
+ temp = readl(USB_USBCMD);
+ temp &= ~USB_CMD_RUN_STOP;
+ writel(temp, USB_USBCMD);
+
+ while (readl(USB_USBCMD) & USB_CMD_RUN_STOP)
+ ;
+ /* Do core reset */
+ temp = readl(USB_USBCMD);
+ temp |= USB_CMD_CTRL_RESET;
+ writel(temp, USB_USBCMD);
+ while (readl(USB_USBCMD) & USB_CMD_CTRL_RESET)
+ ;
+ DBG("DOORE RESET END\n");
+
+#if defined(CONFIG_MX6)
+ reset_usb_phy1();
+#endif
+ DBG("init core to device mode\n");
+ temp = readl(USB_USBMODE);
+ temp &= ~USB_MODE_CTRL_MODE_MASK; /* clear mode bits */
+ temp |= USB_MODE_CTRL_MODE_DEVICE;
+ /* Disable Setup Lockout */
+ temp |= USB_MODE_SETUP_LOCK_OFF;
+ writel(temp, USB_USBMODE);
+
+ temp = readl(USB_OTGSC);
+ temp |= (1<<3);
+ writel(temp, USB_OTGSC);
+ DBG("init core to device mode end\n");
+}
+
+static void usb_init_eps(void)
+{
+ u32 temp;
+ DBG("Flush begin\n");
+ temp = readl(USB_ENDPTNAKEN);
+ temp |= 0x10001; /* clear mode bits */
+ writel(temp, USB_ENDPTNAKEN);
+ writel(readl(USB_ENDPTCOMPLETE), USB_ENDPTCOMPLETE);
+ writel(readl(USB_ENDPTSETUPSTAT), USB_ENDPTSETUPSTAT);
+ writel(0xffffffff, USB_ENDPTFLUSH);
+ DBG("FLUSH END\n");
+}
+
+static void usb_udc_init(void)
+{
+ DBG("\n************************\n");
+ DBG(" usb init start\n");
+ DBG("\n************************\n");
+
+ usb_phy_init();
+ usb_set_mode_device();
+ mxc_init_usb_qh();
+ usb_init_eps();
+ mxc_init_ep_struct();
+ ep0_setup();
+ usb_inited = 1;
+}
+
+static void usb_udc_destroy(void)
+{
+ usb_set_mode_device();
+
+ usb_inited = 0;
+
+ ep0_destroy();
+ mxc_destroy_ep_struct();
+ mxc_destroy_usb_qh();
+}
+
+void usb_shutdown(void)
+{
+ u32 temp;
+ /* disable pullup */
+ temp = readl(USB_USBCMD);
+ temp &= ~USB_CMD_RUN_STOP;
+ writel(temp, USB_USBCMD);
+ mdelay(2);
+}
+
+static void ch9getstatus(u8 request_type,
+ u16 value, u16 index, u16 length)
+{
+ u16 tmp;
+
+ if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
+ tmp = 1 << 0; /* self powerd */
+ tmp |= 0 << 1; /* not remote wakeup able */
+ } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) {
+ tmp = 0;
+ } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
+ tmp = 0;
+ }
+ mxc_udc.ep0_dir = USB_DIR_IN;
+ mxc_udc_queue_update(0, (u8 *)&tmp, 2, 0xffffffff);
+}
+
+static void mxc_udc_read_setup_pkt(struct usb_device_request *s)
+{
+ u32 temp;
+ temp = readl(USB_ENDPTSETUPSTAT);
+ writel(temp, USB_ENDPTSETUPSTAT);
+ DBG("setup stat %x\n", temp);
+ do {
+ temp = readl(USB_USBCMD);
+ temp |= USB_CMD_SUTW;
+ writel(temp, USB_USBCMD);
+
+ invalidate_dcache_range((unsigned long)(mxc_udc.mxc_ep[0].ep_qh),
+ CACHE_ALIGNED_END((mxc_udc.mxc_ep[0].ep_qh),
+ sizeof(struct ep_queue_head)));
+
+ memcpy((void *)s,
+ (void *)mxc_udc.mxc_ep[0].ep_qh->setup_data, 8);
+ } while (!(readl(USB_USBCMD) & USB_CMD_SUTW));
+
+ DBG("handle_setup s.type=%x req=%x len=%x\n",
+ s->bmRequestType, s->bRequest, s->wLength);
+ temp = readl(USB_USBCMD);
+ temp &= ~USB_CMD_SUTW;
+ writel(temp, USB_USBCMD);
+
+ DBG("[SETUP] type=%x req=%x val=%x index=%x len=%x\n",
+ s->bmRequestType, s->bRequest,
+ s->wValue, s->wIndex,
+ s->wLength);
+}
+
+static void mxc_udc_recv_setup(void)
+{
+ struct usb_device_request *s = &ep0_urb->device_request;
+
+ mxc_udc_read_setup_pkt(s);
+ if (s->wLength) {
+ /* If has a data phase,
+ * then prime a dtd for status stage which has zero length DATA0.
+ * The direction of status stage should oppsite to direction of data phase.
+ */
+ mxc_udc.ep0_dir = (s->bmRequestType & USB_DIR_IN) ?
+ USB_DIR_OUT : USB_DIR_IN;
+ mxc_udc_queue_update(0, NULL, 0, 0xffffffff);
+ }
+ if (ep0_recv_setup(ep0_urb)) {
+ mxc_ep0_stall();
+ return;
+ }
+ switch (s->bRequest) {
+ case USB_REQ_GET_STATUS:
+ if ((s->bmRequestType & (USB_DIR_IN | USB_TYPE_MASK)) !=
+ (USB_DIR_IN | USB_TYPE_STANDARD))
+ break;
+ ch9getstatus(s->bmRequestType, s->wValue,
+ s->wIndex, s->wLength);
+
+ DBG("[SETUP] REQ_GET_STATUS\n");
+ return;
+ case USB_REQ_SET_ADDRESS:
+ if (s->bmRequestType != (USB_DIR_OUT |
+ USB_TYPE_STANDARD | USB_RECIP_DEVICE))
+ break;
+ mxc_udc.setaddr = 1;
+ mxc_udc.ep0_dir = USB_DIR_IN;
+ mxc_udc_queue_update(0, NULL, 0, 0xffffffff);
+ usbd_device_event_irq(udc_device, DEVICE_ADDRESS_ASSIGNED, 0);
+ DBG("[SETUP] REQ_SET_ADDRESS\n");
+ return;
+ case USB_REQ_SET_CONFIGURATION:
+ usbd_device_event_irq(udc_device, DEVICE_CONFIGURED, 0);
+ DBG("[SETUP] REQ_SET_CONFIGURATION\n");
+ case USB_REQ_CLEAR_FEATURE:
+ case USB_REQ_SET_FEATURE:
+ {
+ int rc = -1;
+ if ((s->bmRequestType & (USB_RECIP_MASK | USB_TYPE_MASK)) ==
+ (USB_RECIP_ENDPOINT | USB_TYPE_STANDARD))
+ rc = 0;
+ else if ((s->bmRequestType &
+ (USB_RECIP_MASK | USB_TYPE_MASK)) ==
+ (USB_RECIP_DEVICE | USB_TYPE_STANDARD))
+ rc = 0;
+ else
+ break;
+ if (rc == 0) {
+ mxc_udc.ep0_dir = USB_DIR_IN;
+ mxc_udc_queue_update(0, NULL, 0, 0xffffffff);
+ }
+ return;
+ }
+ default:
+ break;
+ }
+ if (s->wLength) {
+ mxc_udc.ep0_dir = (s->bmRequestType & USB_DIR_IN) ?
+ USB_DIR_IN : USB_DIR_OUT;
+ mxc_udc_queue_update(0, ep0_urb->buffer,
+ ep0_urb->actual_length, 0xffffffff);
+ ep0_urb->actual_length = 0;
+ } else {
+ mxc_udc.ep0_dir = USB_DIR_IN;
+ mxc_udc_queue_update(0, NULL, 0, 0xffffffff);
+ }
+}
+
+static int mxc_udc_tqi_empty(struct ep_queue_item *tqi)
+{
+ int ret;
+
+ invalidate_dcache_range((unsigned long)tqi,
+ CACHE_ALIGNED_END(tqi, sizeof(struct ep_queue_item)));
+
+ ret = tqi->info & (1 << 7);
+ return ret;
+}
+
+static struct usb_endpoint_instance *mxc_get_epi(u8 epnum)
+{
+ int i;
+ for (i = 0; i < udc_device->bus->max_endpoints; i++) {
+ if ((udc_device->bus->endpoint_array[i].endpoint_address &
+ USB_ENDPOINT_NUMBER_MASK) == epnum)
+ return &udc_device->bus->endpoint_array[i];
+ }
+ return NULL;
+}
+
+static u32 _mxc_ep_recv_data(u8 epnum, struct ep_queue_item *tqi)
+{
+ struct usb_endpoint_instance *epi = mxc_get_epi(epnum);
+ struct urb *urb;
+ u32 len = 0;
+
+ if (!epi)
+ return 0;
+
+ invalidate_dcache_range((unsigned long)tqi,
+ CACHE_ALIGNED_END(tqi, sizeof(struct ep_queue_item)));
+
+ urb = epi->rcv_urb;
+ if (urb) {
+ u8 *data = urb->buffer + urb->actual_length;
+ int remain_len = (tqi->info >> 16) & (0xefff);
+ len = tqi->reserved[0] - remain_len;
+ DBG("recv len %d-%d-%d\n", len, tqi->reserved[0], remain_len);
+
+
+ invalidate_dcache_range((unsigned long)tqi->page_vir,
+ CACHE_ALIGNED_END(tqi->page_vir, len));
+ memcpy(data, (void *)tqi->page_vir, len);
+
+ _dump_buf(data, len);
+ }
+ return len;
+}
+
+static void mxc_udc_ep_recv(u8 epnum)
+{
+ struct mxc_ep_t *ep = mxc_udc.mxc_ep + (epnum * 2 + USB_RECV);
+ struct ep_queue_item *tqi;
+ while (1) {
+ u32 nbytes;
+ tqi = ep->ep_dtd[ep->done];
+ if (mxc_udc_tqi_empty(tqi))
+ break;
+ nbytes = _mxc_ep_recv_data(epnum, tqi);
+ usbd_rcv_complete(ep->epi, nbytes, 0);
+ inc_index(ep->done);
+ if (ep->done == ep->index)
+ break;
+ }
+}
+
+static void mxc_udc_handle_xfer_complete(void)
+{
+ int i;
+ u32 bitpos = readl(USB_ENDPTCOMPLETE);
+
+ writel(bitpos, USB_ENDPTCOMPLETE);
+
+ for (i = 0; i < mxc_udc.max_ep; i++) {
+ int epnum = i >> 1;
+ int dir = i % 2;
+ u32 bitmask = 1 << (epnum + 16 * dir);
+ if (!(bitmask & bitpos))
+ continue;
+ DBG("ep %d, dir %d, complete\n", epnum, dir);
+ if (!epnum) {
+ if (mxc_udc.setaddr) {
+ writel(udc_device->address << 25,
+ USB_DEVICEADDR);
+ mxc_udc.setaddr = 0;
+ }
+ continue;
+ }
+ DBG("############### dir = %d ***************\n", dir);
+ if (dir == USB_SEND)
+ continue;
+ mxc_udc_ep_recv(epnum);
+ }
+}
+
+static void usb_dev_hand_usbint(void)
+{
+ if (readl(USB_ENDPTSETUPSTAT)) {
+ DBG("recv one setup packet\n");
+ mxc_udc_recv_setup();
+ }
+ if (readl(USB_ENDPTCOMPLETE)) {
+ DBG("Dtd complete irq\n");
+ mxc_udc_handle_xfer_complete();
+ }
+}
+
+static void usb_dev_hand_reset(void)
+{
+ u32 temp;
+ temp = readl(USB_DEVICEADDR);
+ temp &= ~0xfe000000;
+ writel(temp, USB_DEVICEADDR);
+ writel(readl(USB_ENDPTSETUPSTAT), USB_ENDPTSETUPSTAT);
+ writel(readl(USB_ENDPTCOMPLETE), USB_ENDPTCOMPLETE);
+ while (readl(USB_ENDPTPRIME))
+ ;
+ writel(0xffffffff, USB_ENDPTFLUSH);
+ DBG("reset-PORTSC=%x\n", readl(USB_PORTSC1));
+ usbd_device_event_irq(udc_device, DEVICE_RESET, 0);
+}
+
+void usb_dev_hand_pci(void)
+{
+ u32 speed;
+ while (readl(USB_PORTSC1) & PORTSCX_PORT_RESET)
+ ;
+ speed = readl(USB_PORTSC1) & PORTSCX_PORT_SPEED_MASK;
+ switch (speed) {
+ case PORTSCX_PORT_SPEED_HIGH:
+ usb_highspeed = 2;
+ break;
+ case PORTSCX_PORT_SPEED_FULL:
+ usb_highspeed = 1;
+ break;
+ case PORTSCX_PORT_SPEED_LOW:
+ usb_highspeed = 0;
+ break;
+ default:
+ break;
+ }
+ DBG("portspeed=%d, speed = %x, PORTSC = %x\n",
+ usb_highspeed, speed, readl(USB_PORTSC1));
+}
+
+void usb_dev_hand_suspend(void)
+{
+}
+
+void mxc_irq_poll(void)
+{
+ unsigned irq_src = readl(USB_USBSTS) & readl(USB_USBINTR);
+ writel(irq_src, USB_USBSTS);
+
+ if (irq_src == 0)
+ return;
+
+ if (irq_src & USB_STS_INT)
+ usb_dev_hand_usbint();
+
+ if (irq_src & USB_STS_RESET) {
+ printf("USB_RESET\n");
+ usb_dev_hand_reset();
+ }
+ if (irq_src & USB_STS_PORT_CHANGE) {
+ printf("USB_PORT_CHANGE 0x%x\n", irq_src);
+ usb_dev_hand_pci();
+ }
+ if (irq_src & USB_STS_SUSPEND)
+ printf("USB_SUSPEND\n");
+ if (irq_src & USB_STS_ERR)
+ printf("USB_ERR\n");
+}
+
+void mxc_udc_wait_cable_insert(void)
+{
+ u32 temp;
+ int cable_connect = 1;
+
+ do {
+ udelay(50);
+
+ temp = readl(USB_OTGSC);
+ if (temp & (OTGSC_B_SESSION_VALID)) {
+ printf("USB Mini b cable Connected!\n");
+ break;
+ } else if (cable_connect == 1) {
+ printf("wait usb cable into the connector!\n");
+ cable_connect = 0;
+ }
+ } while (1);
+}
+
+void udc_disable_over_current(void)
+{
+ u32 temp;
+ temp = readl(USB_OTG_CTRL);
+ temp |= (UCTRL_OVER_CUR_POL);
+ writel(temp, USB_OTG_CTRL);
+}
+
+/*
+ * mxc_udc_init function
+ */
+int mxc_udc_init(void)
+{
+ udc_pins_setting();
+ set_usb_phy1_clk();
+ enable_usboh3_clk(1);
+#if defined(CONFIG_MX6)
+ udc_disable_over_current();
+#endif
+ enable_usb_phy1_clk(1);
+ usb_udc_init();
+
+ return 0;
+}
+
+/*
+ * mxc_udc_init function
+ */
+int mxc_udc_destroy(void)
+{
+ usb_udc_destroy();
+ enable_usboh3_clk(0);
+ enable_usb_phy1_clk(0);
+
+ return 0;
+}
+
+void mxc_udc_poll(void)
+{
+ mxc_irq_poll();
+}
+
+/*
+ * Functions for gadget APIs
+ */
+int udc_init(void)
+{
+ mxc_udc_init();
+ return 0;
+}
+
+int udc_destroy(void)
+{
+ udc_disable();
+ mxc_udc_destroy();
+ return 0;
+}
+
+void udc_setup_ep(struct usb_device_instance *device, u32 index,
+ struct usb_endpoint_instance *epi)
+{
+ u8 dir, epnum, zlt, mult;
+ u8 ep_type;
+ u32 max_pkt_size;
+ int ep_addr;
+ struct mxc_ep_t *ep;
+
+ if (epi) {
+ zlt = 1;
+ mult = 0;
+ ep_addr = epi->endpoint_address;
+ epnum = ep_addr & USB_ENDPOINT_NUMBER_MASK;
+ DBG("setup ep %d\n", epnum);
+ if ((ep_addr & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN) {
+ dir = USB_SEND;
+ ep_type = epi->tx_attributes;
+ max_pkt_size = epi->tx_packetSize;
+ } else {
+ dir = USB_RECV;
+ ep_type = epi->rcv_attributes;
+ max_pkt_size = epi->rcv_packetSize;
+ }
+ if (ep_type == USB_ENDPOINT_XFER_ISOC) {
+ mult = (u32)(1 + ((max_pkt_size >> 11) & 0x03));
+ max_pkt_size = max_pkt_size & 0x7ff;
+ DBG("mult = %d\n", mult);
+ }
+ ep = mxc_udc.mxc_ep + (epnum * 2 + dir);
+ ep->epi = epi;
+ if (epnum) {
+ struct ep_queue_item *tqi;
+ int i;
+
+ mxc_ep_qh_setup(epnum, dir, ep_type,
+ max_pkt_size, zlt, mult);
+ mxc_ep_setup(epnum, dir, ep_type);
+ mxc_init_ep_dtd(epnum * 2 + dir);
+
+ /* malloc endpoint's dtd's data buffer*/
+ ep->max_pkt_size = max_pkt_size;
+ for (i = 0; i < EP_TQ_ITEM_SIZE; i++) {
+ tqi = ep->ep_dtd[i];
+ tqi->page_vir = (u32)malloc_aligned_buffer(
+ &tqi->page_unaligned, max_pkt_size,
+ USB_MEM_ALIGN_BYTE);
+ if ((void *)tqi->page_vir == NULL) {
+ printf("malloc dtd bufer failure\n");
+ return;
+ }
+ mxc_tqi_init_page(tqi);
+
+ flush_dcache_range((unsigned long)tqi,
+ CACHE_ALIGNED_END(tqi, sizeof(struct ep_queue_item)));
+ }
+ }
+ }
+}
+
+void udc_destroy_ep(struct usb_device_instance *device,
+ struct usb_endpoint_instance *epi)
+{
+ struct mxc_ep_t *ep;
+ int ep_addr;
+ u8 dir, epnum;
+
+ if (epi) {
+ ep_addr = epi->endpoint_address;
+ epnum = ep_addr & USB_ENDPOINT_NUMBER_MASK;
+
+ if ((ep_addr & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN)
+ dir = USB_SEND;
+ else
+ dir = USB_RECV;
+
+ ep = mxc_udc.mxc_ep + (epnum * 2 + dir);
+ ep->epi = 0;
+
+ if (epnum) {
+ struct ep_queue_item *tqi;
+ int i;
+
+ for (i = 0; i < EP_TQ_ITEM_SIZE; i++) {
+ tqi = ep->ep_dtd[i];
+ if (tqi->page_vir) {
+ free((void *)(tqi->page_unaligned));
+ tqi->page_unaligned = 0;
+ tqi->page_vir = 0;
+ tqi->page0 = 0;
+ tqi->page1 = 0;
+ tqi->page2 = 0;
+ tqi->page3 = 0;
+ tqi->page4 = 0;
+ }
+ }
+
+ mxc_destroy_ep_dtd(epnum * 2 + dir);
+ mxc_ep_destroy(epnum, dir);
+ }
+ }
+}
+
+int udc_endpoint_write(struct usb_endpoint_instance *epi)
+{
+ struct urb *urb = epi->tx_urb;
+ int ep_num = epi->endpoint_address & USB_ENDPOINT_NUMBER_MASK;
+ u8 *data = (u8 *)urb->buffer + epi->sent;
+ int n = urb->actual_length - epi->sent;
+ mxc_udc_txqueue_update(ep_num, data, n);
+ epi->last = n;
+
+ /* usbd_tx_complete will take care of updating 'sent' */
+ usbd_tx_complete(epi);
+ return 0;
+}
+
+void udc_enable(struct usb_device_instance *device)
+{
+ udc_device = device;
+ ep0_urb = usbd_alloc_urb(udc_device, udc_device->bus->endpoint_array);
+}
+
+void udc_disable(void)
+{
+ usbd_dealloc_urb(ep0_urb);
+ udc_device = NULL;
+}
+
+void udc_startup_events(struct usb_device_instance *device)
+{
+ usbd_device_event_irq(device, DEVICE_INIT, 0);
+ usbd_device_event_irq(device, DEVICE_CREATE, 0);
+ udc_enable(device);
+}
+
+void udc_irq(void)
+{
+ mxc_irq_poll();
+}
+
+void udc_connect(void)
+{
+ mxc_usb_run();
+ mxc_udc_wait_cable_insert();
+}
+
+void udc_disconnect(void)
+{
+ /* imx6 will hang if access usb register without init oh3
+ * clock, so not access it if not init. */
+ if (usb_inited)
+ mxc_usb_stop();
+}
+
+void udc_set_nak(int epid)
+{
+}
+
+void udc_unset_nak(int epid)
+{
+}