diff options
Diffstat (limited to 'drivers/usb/gadget/fsl_udc_pbl.c')
| -rw-r--r-- | drivers/usb/gadget/fsl_udc_pbl.c | 210 |
1 files changed, 0 insertions, 210 deletions
diff --git a/drivers/usb/gadget/fsl_udc_pbl.c b/drivers/usb/gadget/fsl_udc_pbl.c deleted file mode 100644 index 0fbe941b12..0000000000 --- a/drivers/usb/gadget/fsl_udc_pbl.c +++ /dev/null @@ -1,210 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only - -#include <common.h> -#include <usb/ch9.h> -#include <soc/fsl/fsl_udc.h> -#include <mach/imx8mm-regs.h> - -static void fsl_queue_td(struct usb_dr_device *dr, struct ep_td_struct *dtd, - int ep_is_in) -{ - int ep_index = 0; - int i = ep_index * 2 + ep_is_in; - u32 bitmask; - volatile struct ep_queue_head *dQH = - (void *)(unsigned long)readl(&dr->endpointlistaddr); - unsigned long td_dma = (unsigned long)dtd; - - dQH = &dQH[i]; - - bitmask = ep_is_in ? (1 << (ep_index + 16)) : (1 << (ep_index)); - - dQH->next_dtd_ptr = cpu_to_le32(td_dma & EP_QUEUE_HEAD_NEXT_POINTER_MASK); - - dQH->size_ioc_int_sts &= cpu_to_le32(~(EP_QUEUE_HEAD_STATUS_ACTIVE - | EP_QUEUE_HEAD_STATUS_HALT)); - - writel(bitmask, &dr->endpointprime); -} - -static struct ep_td_struct dtd_data __attribute__((aligned(64))); -static struct ep_td_struct dtd_status __attribute__((aligned(64))); - -static int fsl_ep_queue(struct usb_dr_device *dr, struct ep_td_struct *dtd, - void *buf, int len) -{ - u32 swap_temp; - - memset(dtd, 0, sizeof(*dtd)); - - /* Clear reserved field */ - swap_temp = cpu_to_le32(dtd->size_ioc_sts); - swap_temp &= ~DTD_RESERVED_FIELDS; - dtd->size_ioc_sts = cpu_to_le32(swap_temp); - - swap_temp = (unsigned long)buf; - dtd->buff_ptr0 = cpu_to_le32(swap_temp); - dtd->buff_ptr1 = cpu_to_le32(swap_temp + 0x1000); - dtd->buff_ptr2 = cpu_to_le32(swap_temp + 0x2000); - dtd->buff_ptr3 = cpu_to_le32(swap_temp + 0x3000); - dtd->buff_ptr4 = cpu_to_le32(swap_temp + 0x4000); - - /* Fill in the transfer size; set active bit */ - swap_temp = ((len << DTD_LENGTH_BIT_POS) | DTD_STATUS_ACTIVE) | DTD_IOC; - - writel(cpu_to_le32(swap_temp), &dtd->size_ioc_sts); - - dtd->next_td_ptr = cpu_to_le32(DTD_NEXT_TERMINATE); - - fsl_queue_td(dr, dtd, len ? 0 : 1); - - return 0; -} - -enum state { - state_init = 0, - state_expect_command, - state_transfer_data, - state_complete, -}; - -#define MAX_TRANSFER_SIZE 2048 - -static enum state state; -static uint8_t databuf[MAX_TRANSFER_SIZE] __attribute__((aligned(64))); -static int actual; -static int to_transfer; -static void *image; - -static void tripwire_handler(struct usb_dr_device *dr, u8 ep_num) -{ - uint32_t val; - struct ep_queue_head *qh; - struct ep_queue_head *dQH = (void *)(unsigned long)readl(&dr->endpointlistaddr); - struct usb_ctrlrequest *ctrl; - - qh = &dQH[ep_num * 2]; - - val = readl(&dr->endptsetupstat); - val |= 1 << ep_num; - writel(val, &dr->endptsetupstat); - - do { - val = readl(&dr->usbcmd); - val |= USB_CMD_SUTW; - writel(val, &dr->usbcmd); - - ctrl = (void *)qh->setup_buffer; - if ((ctrl->wValue & 0xff) == 1) - state = state_expect_command; - - } while (!(readl(&dr->usbcmd) & USB_CMD_SUTW)); - - val = readl(&dr->usbcmd); - val &= ~USB_CMD_SUTW; - writel(val, &dr->usbcmd); - - fsl_ep_queue(dr, &dtd_data, databuf, MAX_TRANSFER_SIZE); -} - -static void dtd_complete_irq(struct usb_dr_device *dr) -{ - struct ep_td_struct *dtd = &dtd_data; - u32 bit_pos; - int len; - - /* Clear the bits in the register */ - bit_pos = readl(&dr->endptcomplete); - writel(bit_pos, &dr->endptcomplete); - - if (!(bit_pos & 1)) - return; - - len = MAX_TRANSFER_SIZE - - (le32_to_cpu(dtd->size_ioc_sts) >> DTD_LENGTH_BIT_POS); - - if (state == state_expect_command) { - state = state_transfer_data; - to_transfer = databuf[8] << 24 | - databuf[9] << 16 | - databuf[10] << 8 | - databuf[11]; - } else { - memcpy(image + actual, &databuf[1], len - 1); - actual += len - 1; - to_transfer -= len - 1; - - if (to_transfer == 0) - state = state_complete; - } - - fsl_ep_queue(dr, &dtd_status, NULL, 0); -} - -static int usb_irq(struct usb_dr_device *dr) -{ - uint32_t irq_src = readl(&dr->usbsts); - - irq_src &= ~0x80; - - if (!irq_src) - return -EAGAIN; - - /* Clear notification bits */ - writel(irq_src, &dr->usbsts); - - /* USB Interrupt */ - if (irq_src & USB_STS_INT) { - /* Setup package, we only support ep0 as control ep */ - if (readl(&dr->endptsetupstat) & EP_SETUP_STATUS_EP0) - tripwire_handler(dr, 0); - - /* completion of dtd */ - if (readl(&dr->endptcomplete)) - dtd_complete_irq(dr); - } - - if (state == state_complete) - return 0; - else - return -EAGAIN; -} - -int imx_barebox_load_usb(void __iomem *dr, void *dest) -{ - int ret; - - image = dest; - - while (1) { - ret = usb_irq(dr); - if (!ret) - break; - } - - return 0; -} - -int imx_barebox_start_usb(void __iomem *dr, void *dest) -{ - void __noreturn (*bb)(void); - int ret; - - ret = imx_barebox_load_usb(dr, dest); - if (ret) - return ret; - - printf("Downloading complete, start barebox\n"); - bb = dest; - bb(); -} - -int imx8mm_barebox_load_usb(void *dest) -{ - return imx_barebox_load_usb(IOMEM(MX8MM_USB1_BASE_ADDR), dest); -} - -int imx8mm_barebox_start_usb(void *dest) -{ - return imx_barebox_start_usb(IOMEM(MX8MM_USB1_BASE_ADDR), dest); -} |