18  *		For USB HCD implementation.
63 #include <linux/usb/hcd.h>
66 #include <linux/platform_data/max3421-hcd.h>
132 	 * SPI-thread without acquiring the HCD lock:
329 hcd_to_max3421(struct usb_hcd *hcd)  in hcd_to_max3421()  argument
331 	return (struct max3421_hcd *) hcd->hcd_priv;  in hcd_to_max3421()
341 spi_rd8(struct usb_hcd *hcd, unsigned int reg)  in spi_rd8()  argument
343 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in spi_rd8()
344 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in spi_rd8()
367 spi_wr8(struct usb_hcd *hcd, unsigned int reg, u8 val)  in spi_wr8()  argument
369 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in spi_wr8()
370 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in spi_wr8()
391 spi_rd_buf(struct usb_hcd *hcd, unsigned int reg, void *buf, size_t len)  in spi_rd_buf()  argument
393 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in spi_rd_buf()
394 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in spi_rd_buf()
417 spi_wr_buf(struct usb_hcd *hcd, unsigned int reg, void *buf, size_t len)  in spi_wr_buf()  argument
419 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in spi_wr_buf()
420 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in spi_wr_buf()
457 max3421_set_speed(struct usb_hcd *hcd, struct usb_device *dev)  in max3421_set_speed()  argument
459 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_set_speed()
474 		spi_wr8(hcd, MAX3421_REG_MODE, max3421_hcd->mode);  in max3421_set_speed()
480  * Caller must NOT hold HCD spinlock.
483 max3421_set_address(struct usb_hcd *hcd, struct usb_device *dev, int epnum)  in max3421_set_address()  argument
494 	spi_wr8(hcd, MAX3421_REG_HCTL, hctl);  in max3421_set_address()
501 	spi_wr8(hcd, MAX3421_REG_PERADDR, dev->devnum);  in max3421_set_address()
505 max3421_ctrl_setup(struct usb_hcd *hcd, struct urb *urb)  in max3421_ctrl_setup()  argument
507 	spi_wr_buf(hcd, MAX3421_REG_SUDFIFO, urb->setup_packet, 8);  in max3421_ctrl_setup()
512 max3421_transfer_in(struct usb_hcd *hcd, struct urb *urb)  in max3421_transfer_in()  argument
514 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_transfer_in()
523 max3421_transfer_out(struct usb_hcd *hcd, struct urb *urb, int fast_retransmit)  in max3421_transfer_out()  argument
525 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in max3421_transfer_out()
526 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_transfer_out()
536 			spi_wr8(hcd, MAX3421_REG_SNDBC, 0);  in max3421_transfer_out()
537 			spi_wr8(hcd, MAX3421_REG_SNDFIFO, ((u8 *) src)[0]);  in max3421_transfer_out()
538 			spi_wr8(hcd, MAX3421_REG_SNDBC, max3421_hcd->curr_len);  in max3421_transfer_out()
559 	spi_wr_buf(hcd, MAX3421_REG_SNDFIFO, src, max3421_hcd->curr_len);  in max3421_transfer_out()
560 	spi_wr8(hcd, MAX3421_REG_SNDBC, max3421_hcd->curr_len);  in max3421_transfer_out()
566  * Caller must NOT hold HCD spinlock.
569 max3421_next_transfer(struct usb_hcd *hcd, int fast_retransmit)  in max3421_next_transfer()  argument
571 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_next_transfer()
583 		cmd = max3421_ctrl_setup(hcd, urb);  in max3421_next_transfer()
588 			cmd = max3421_transfer_in(hcd, urb);  in max3421_next_transfer()
590 			cmd = max3421_transfer_out(hcd, urb, fast_retransmit);  in max3421_next_transfer()
610 	spi_wr8(hcd, MAX3421_REG_HXFR, cmd);  in max3421_next_transfer()
624  * o Caller must NOT hold HCD spinlock.
629 max3421_select_and_start_urb(struct usb_hcd *hcd)  in max3421_select_and_start_urb()  argument
631 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in max3421_select_and_start_urb()
632 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_select_and_start_urb()
752 	max3421_set_address(hcd, urb->dev, epnum);  in max3421_select_and_start_urb()
753 	max3421_set_speed(hcd, urb->dev);  in max3421_select_and_start_urb()
754 	max3421_next_transfer(hcd, 0);  in max3421_select_and_start_urb()
761  * Caller must NOT hold HCD spinlock.
764 max3421_check_unlink(struct usb_hcd *hcd)  in max3421_check_unlink()  argument
766 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in max3421_check_unlink()
767 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_check_unlink()
782 				usb_hcd_unlink_urb_from_ep(hcd, urb);  in max3421_check_unlink()
785 				usb_hcd_giveback_urb(hcd, urb, 0);  in max3421_check_unlink()
795  * Caller must NOT hold HCD spinlock.
798 max3421_slow_retransmit(struct usb_hcd *hcd)  in max3421_slow_retransmit()  argument
800 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_slow_retransmit()
810  * Caller must NOT hold HCD spinlock.
813 max3421_recv_data_available(struct usb_hcd *hcd)  in max3421_recv_data_available()  argument
815 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_recv_data_available()
820 	rcvbc = spi_rd8(hcd, MAX3421_REG_RCVBC);  in max3421_recv_data_available()
834 		spi_rd_buf(hcd, MAX3421_REG_RCVFIFO, dst, transfer_size);  in max3421_recv_data_available()
840 	spi_wr8(hcd, MAX3421_REG_HIRQ, BIT(MAX3421_HI_RCVDAV_BIT));  in max3421_recv_data_available()
844 max3421_handle_error(struct usb_hcd *hcd, u8 hrsl)  in max3421_handle_error()  argument
846 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in max3421_handle_error()
847 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_handle_error()
889 			spi_wr8(hcd, MAX3421_REG_HCTL,  in max3421_handle_error()
901 			max3421_slow_retransmit(hcd);  in max3421_handle_error()
921 		max3421_next_transfer(hcd, 1);  in max3421_handle_error()
926 		spi_wr8(hcd, MAX3421_REG_SNDBC, 0);  in max3421_handle_error()
930  * Caller must NOT hold HCD spinlock.
933 max3421_transfer_in_done(struct usb_hcd *hcd, struct urb *urb)  in max3421_transfer_in_done()  argument
935 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in max3421_transfer_in_done()
936 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_transfer_in_done()
974  * Caller must NOT hold HCD spinlock.
977 max3421_transfer_out_done(struct usb_hcd *hcd, struct urb *urb)  in max3421_transfer_out_done()  argument
979 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_transfer_out_done()
1001  * Caller must NOT hold HCD spinlock.
1004 max3421_host_transfer_done(struct usb_hcd *hcd)  in max3421_host_transfer_done()  argument
1006 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_host_transfer_done()
1015 	hrsl = spi_rd8(hcd, MAX3421_REG_HRSL);  in max3421_host_transfer_done()
1025 		max3421_handle_error(hcd, hrsl);  in max3421_host_transfer_done()
1042 			urb_done = max3421_transfer_in_done(hcd, urb);  in max3421_host_transfer_done()
1044 			urb_done = max3421_transfer_out_done(hcd, urb);  in max3421_host_transfer_done()
1063 		max3421_next_transfer(hcd, 0);  in max3421_host_transfer_done()
1067  * Caller must NOT hold HCD spinlock.
1070 max3421_detect_conn(struct usb_hcd *hcd)  in max3421_detect_conn()  argument
1072 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_detect_conn()
1078 	hrsl = spi_rd8(hcd, MAX3421_REG_HRSL);  in max3421_detect_conn()
1109 	spi_wr8(hcd, MAX3421_REG_MODE, max3421_hcd->mode);  in max3421_detect_conn()
1129 	struct usb_hcd *hcd = dev_id;  in max3421_irq_handler()  local
1130 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in max3421_irq_handler()
1131 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_irq_handler()
1143 dump_eps(struct usb_hcd *hcd)  in dump_eps()  argument
1145 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in dump_eps()
1184 max3421_handle_irqs(struct usb_hcd *hcd)  in max3421_handle_irqs()  argument
1186 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_handle_irqs()
1196 	hirq = spi_rd8(hcd, MAX3421_REG_HIRQ);  in max3421_handle_irqs()
1201 	spi_wr8(hcd, MAX3421_REG_HIRQ,  in max3421_handle_irqs()
1212 		max3421_recv_data_available(hcd);  in max3421_handle_irqs()
1215 		max3421_host_transfer_done(hcd);  in max3421_handle_irqs()
1218 		max3421_detect_conn(hcd);  in max3421_handle_irqs()
1221 	 * Now process interrupts that may affect HCD state  in max3421_handle_irqs()
1269 			dump_eps(hcd);  in max3421_handle_irqs()
1277 max3421_reset_hcd(struct usb_hcd *hcd)  in max3421_reset_hcd()  argument
1279 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in max3421_reset_hcd()
1280 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_reset_hcd()
1284 	spi_wr8(hcd, MAX3421_REG_USBCTL, BIT(MAX3421_USBCTL_CHIPRES_BIT));  in max3421_reset_hcd()
1286 	spi_wr8(hcd, MAX3421_REG_USBCTL, 0);  in max3421_reset_hcd()
1289 		if (spi_rd8(hcd, MAX3421_REG_USBIRQ)  in max3421_reset_hcd()
1308 	spi_wr8(hcd, MAX3421_REG_MODE, max3421_hcd->mode);  in max3421_reset_hcd()
1312 	spi_wr8(hcd, MAX3421_REG_HCTL, BIT(MAX3421_HCTL_FRMRST_BIT));  in max3421_reset_hcd()
1315 	spi_wr8(hcd, MAX3421_REG_HCTL, BIT(MAX3421_HCTL_SAMPLEBUS_BIT));  in max3421_reset_hcd()
1316 	max3421_detect_conn(hcd);  in max3421_reset_hcd()
1322 	spi_wr8(hcd, MAX3421_REG_HIEN, max3421_hcd->hien);  in max3421_reset_hcd()
1325 	spi_wr8(hcd, MAX3421_REG_CPUCTL, BIT(MAX3421_CPUCTL_IE_BIT));  in max3421_reset_hcd()
1330 max3421_urb_done(struct usb_hcd *hcd)  in max3421_urb_done()  argument
1332 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_urb_done()
1344 		u8 hrsl = spi_rd8(hcd, MAX3421_REG_HRSL);  in max3421_urb_done()
1349 		/* no locking: HCD (i.e., we) own toggles, don't we? */  in max3421_urb_done()
1355 		usb_hcd_unlink_urb_from_ep(hcd, urb);  in max3421_urb_done()
1358 		/* must be called without the HCD spinlock: */  in max3421_urb_done()
1359 		usb_hcd_giveback_urb(hcd, urb, status);  in max3421_urb_done()
1367 	struct usb_hcd *hcd = dev_id;  in max3421_spi_thread()  local
1368 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in max3421_spi_thread()
1369 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_spi_thread()
1373 	spi_wr8(hcd, MAX3421_REG_PINCTL,  in max3421_spi_thread()
1378 		max3421_hcd->rev = spi_rd8(hcd, MAX3421_REG_REVISION);  in max3421_spi_thread()
1395 			spi_wr8(hcd, MAX3421_REG_HIEN, max3421_hcd->hien);  in max3421_spi_thread()
1407 			i_worked |= max3421_urb_done(hcd);  in max3421_spi_thread()
1408 		else if (max3421_handle_irqs(hcd))  in max3421_spi_thread()
1411 			i_worked |= max3421_select_and_start_urb(hcd);  in max3421_spi_thread()
1414 			/* reset the HCD: */  in max3421_spi_thread()
1415 			i_worked |= max3421_reset_hcd(hcd);  in max3421_spi_thread()
1418 			spi_wr8(hcd, MAX3421_REG_HCTL,  in max3421_spi_thread()
1423 			i_worked |= max3421_check_unlink(hcd);  in max3421_spi_thread()
1430 				u8 val = spi_rd8(hcd, MAX3421_REG_IOPINS1 + i);  in max3421_spi_thread()
1434 				spi_wr8(hcd, MAX3421_REG_IOPINS1 + i, val);  in max3421_spi_thread()
1446 max3421_reset_port(struct usb_hcd *hcd)  in max3421_reset_port()  argument
1448 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_reset_port()
1459 max3421_reset(struct usb_hcd *hcd)  in max3421_reset()  argument
1461 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_reset()
1463 	hcd->self.sg_tablesize = 0;  in max3421_reset()
1464 	hcd->speed = HCD_USB2;  in max3421_reset()
1465 	hcd->self.root_hub->speed = USB_SPEED_FULL;  in max3421_reset()
1472 max3421_start(struct usb_hcd *hcd)  in max3421_start()  argument
1474 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_start()
1481 	hcd->power_budget = POWER_BUDGET;  in max3421_start()
1482 	hcd->state = HC_STATE_RUNNING;  in max3421_start()
1483 	hcd->uses_new_polling = 1;  in max3421_start()
1488 max3421_stop(struct usb_hcd *hcd)  in max3421_stop()  argument
1493 max3421_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags)  in max3421_urb_enqueue()  argument
1495 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in max3421_urb_enqueue()
1496 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_urb_enqueue()
1532 	retval = usb_hcd_link_urb_to_ep(hcd, urb);  in max3421_urb_enqueue()
1545 max3421_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)  in max3421_urb_dequeue()  argument
1547 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_urb_dequeue()
1557 	retval = usb_hcd_check_unlink_urb(hcd, urb, status);  in max3421_urb_dequeue()
1567 max3421_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *ep)  in max3421_endpoint_disable()  argument
1569 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_endpoint_disable()
1588 max3421_get_frame_number(struct usb_hcd *hcd)  in max3421_get_frame_number()  argument
1590 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_get_frame_number()
1599 max3421_hub_status_data(struct usb_hcd *hcd, char *buf)  in max3421_hub_status_data()  argument
1601 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_hub_status_data()
1606 	if (!HCD_HW_ACCESSIBLE(hcd))  in max3421_hub_status_data()
1612 		dev_dbg(hcd->self.controller,  in max3421_hub_status_data()
1617 			usb_hcd_resume_root_hub(hcd);  in max3421_hub_status_data()
1644 max3421_gpout_set_value(struct usb_hcd *hcd, u8 pin_number, u8 value)  in max3421_gpout_set_value()  argument
1646 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_gpout_set_value()
1665 max3421_hub_control(struct usb_hcd *hcd, u16 type_req, u16 value, u16 index,  in max3421_hub_control()  argument
1668 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in max3421_hub_control()
1669 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_hub_control()
1686 			dev_dbg(hcd->self.controller, "power-off\n");  in max3421_hub_control()
1687 			max3421_gpout_set_value(hcd, pdata->vbus_gpout,  in max3421_hub_control()
1735 			dev_dbg(hcd->self.controller, "power-on\n");  in max3421_hub_control()
1737 			max3421_gpout_set_value(hcd, pdata->vbus_gpout,  in max3421_hub_control()
1741 			max3421_reset_port(hcd);  in max3421_hub_control()
1751 		dev_dbg(hcd->self.controller,  in max3421_hub_control()
1763 max3421_bus_suspend(struct usb_hcd *hcd)  in max3421_bus_suspend()  argument
1769 max3421_bus_resume(struct usb_hcd *hcd)  in max3421_bus_resume()  argument
1819 	struct usb_hcd *hcd = NULL;  in max3421_probe()  local
1864 	hcd = usb_create_hcd(&max3421_hcd_desc, &spi->dev,  in max3421_probe()
1866 	if (!hcd) {  in max3421_probe()
1867 		dev_err(&spi->dev, "failed to create HCD structure\n");  in max3421_probe()
1870 	set_bit(HCD_FLAG_POLL_RH, &hcd->flags);  in max3421_probe()
1871 	max3421_hcd = hcd_to_max3421(hcd);  in max3421_probe()
1882 	max3421_hcd->spi_thread = kthread_run(max3421_spi_thread, hcd,  in max3421_probe()
1890 	retval = usb_add_hcd(hcd, 0, 0);  in max3421_probe()
1892 		dev_err(&spi->dev, "failed to add HCD\n");  in max3421_probe()
1897 			     IRQF_TRIGGER_LOW, "max3421", hcd);  in max3421_probe()
1910 	if (hcd) {  in max3421_probe()
1915 		usb_put_hcd(hcd);  in max3421_probe()
1924 	struct usb_hcd *hcd;  in max3421_remove()  local
1928 	hcd = max3421_to_hcd(max3421_hcd);  in max3421_remove()
1930 	usb_remove_hcd(hcd);  in max3421_remove()
1938 	free_irq(spi->irq, hcd);  in max3421_remove()
1940 	usb_put_hcd(hcd);  in max3421_remove()
1953 		.name	= "max3421-hcd",