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()
787 					usb_hcd_unlink_urb_from_ep(hcd, urb);  in max3421_check_unlink()
790 					usb_hcd_giveback_urb(hcd, urb, 0);  in max3421_check_unlink()
801  * Caller must NOT hold HCD spinlock.
804 max3421_slow_retransmit(struct usb_hcd *hcd)  in max3421_slow_retransmit()  argument
806 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_slow_retransmit()
816  * Caller must NOT hold HCD spinlock.
819 max3421_recv_data_available(struct usb_hcd *hcd)  in max3421_recv_data_available()  argument
821 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_recv_data_available()
826 	rcvbc = spi_rd8(hcd, MAX3421_REG_RCVBC);  in max3421_recv_data_available()
840 		spi_rd_buf(hcd, MAX3421_REG_RCVFIFO, dst, transfer_size);  in max3421_recv_data_available()
846 	spi_wr8(hcd, MAX3421_REG_HIRQ, BIT(MAX3421_HI_RCVDAV_BIT));  in max3421_recv_data_available()
850 max3421_handle_error(struct usb_hcd *hcd, u8 hrsl)  in max3421_handle_error()  argument
852 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in max3421_handle_error()
853 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_handle_error()
895 			spi_wr8(hcd, MAX3421_REG_HCTL,  in max3421_handle_error()
907 			max3421_slow_retransmit(hcd);  in max3421_handle_error()
927 		max3421_next_transfer(hcd, 1);  in max3421_handle_error()
932 		spi_wr8(hcd, MAX3421_REG_SNDBC, 0);  in max3421_handle_error()
936  * Caller must NOT hold HCD spinlock.
939 max3421_transfer_in_done(struct usb_hcd *hcd, struct urb *urb)  in max3421_transfer_in_done()  argument
941 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in max3421_transfer_in_done()
942 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_transfer_in_done()
980  * Caller must NOT hold HCD spinlock.
983 max3421_transfer_out_done(struct usb_hcd *hcd, struct urb *urb)  in max3421_transfer_out_done()  argument
985 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_transfer_out_done()
1007  * Caller must NOT hold HCD spinlock.
1010 max3421_host_transfer_done(struct usb_hcd *hcd)  in max3421_host_transfer_done()  argument
1012 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_host_transfer_done()
1021 	hrsl = spi_rd8(hcd, MAX3421_REG_HRSL);  in max3421_host_transfer_done()
1031 		max3421_handle_error(hcd, hrsl);  in max3421_host_transfer_done()
1048 			urb_done = max3421_transfer_in_done(hcd, urb);  in max3421_host_transfer_done()
1050 			urb_done = max3421_transfer_out_done(hcd, urb);  in max3421_host_transfer_done()
1069 		max3421_next_transfer(hcd, 0);  in max3421_host_transfer_done()
1073  * Caller must NOT hold HCD spinlock.
1076 max3421_detect_conn(struct usb_hcd *hcd)  in max3421_detect_conn()  argument
1078 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_detect_conn()
1084 	hrsl = spi_rd8(hcd, MAX3421_REG_HRSL);  in max3421_detect_conn()
1115 	spi_wr8(hcd, MAX3421_REG_MODE, max3421_hcd->mode);  in max3421_detect_conn()
1135 	struct usb_hcd *hcd = dev_id;  in max3421_irq_handler()  local
1136 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in max3421_irq_handler()
1137 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_irq_handler()
1149 dump_eps(struct usb_hcd *hcd)  in dump_eps()  argument
1151 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in dump_eps()
1190 max3421_handle_irqs(struct usb_hcd *hcd)  in max3421_handle_irqs()  argument
1192 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_handle_irqs()
1202 	hirq = spi_rd8(hcd, MAX3421_REG_HIRQ);  in max3421_handle_irqs()
1207 	spi_wr8(hcd, MAX3421_REG_HIRQ,  in max3421_handle_irqs()
1218 		max3421_recv_data_available(hcd);  in max3421_handle_irqs()
1221 		max3421_host_transfer_done(hcd);  in max3421_handle_irqs()
1224 		max3421_detect_conn(hcd);  in max3421_handle_irqs()
1227 	 * Now process interrupts that may affect HCD state  in max3421_handle_irqs()
1275 			dump_eps(hcd);  in max3421_handle_irqs()
1283 max3421_reset_hcd(struct usb_hcd *hcd)  in max3421_reset_hcd()  argument
1285 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in max3421_reset_hcd()
1286 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_reset_hcd()
1290 	spi_wr8(hcd, MAX3421_REG_USBCTL, BIT(MAX3421_USBCTL_CHIPRES_BIT));  in max3421_reset_hcd()
1292 	spi_wr8(hcd, MAX3421_REG_USBCTL, 0);  in max3421_reset_hcd()
1295 		if (spi_rd8(hcd, MAX3421_REG_USBIRQ)  in max3421_reset_hcd()
1314 	spi_wr8(hcd, MAX3421_REG_MODE, max3421_hcd->mode);  in max3421_reset_hcd()
1318 	spi_wr8(hcd, MAX3421_REG_HCTL, BIT(MAX3421_HCTL_FRMRST_BIT));  in max3421_reset_hcd()
1321 	spi_wr8(hcd, MAX3421_REG_HCTL, BIT(MAX3421_HCTL_SAMPLEBUS_BIT));  in max3421_reset_hcd()
1322 	max3421_detect_conn(hcd);  in max3421_reset_hcd()
1328 	spi_wr8(hcd, MAX3421_REG_HIEN, max3421_hcd->hien);  in max3421_reset_hcd()
1331 	spi_wr8(hcd, MAX3421_REG_CPUCTL, BIT(MAX3421_CPUCTL_IE_BIT));  in max3421_reset_hcd()
1336 max3421_urb_done(struct usb_hcd *hcd)  in max3421_urb_done()  argument
1338 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_urb_done()
1350 		u8 hrsl = spi_rd8(hcd, MAX3421_REG_HRSL);  in max3421_urb_done()
1355 		/* no locking: HCD (i.e., we) own toggles, don't we? */  in max3421_urb_done()
1361 		usb_hcd_unlink_urb_from_ep(hcd, urb);  in max3421_urb_done()
1364 		/* must be called without the HCD spinlock: */  in max3421_urb_done()
1365 		usb_hcd_giveback_urb(hcd, urb, status);  in max3421_urb_done()
1373 	struct usb_hcd *hcd = dev_id;  in max3421_spi_thread()  local
1374 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in max3421_spi_thread()
1375 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_spi_thread()
1379 	spi_wr8(hcd, MAX3421_REG_PINCTL,  in max3421_spi_thread()
1384 		max3421_hcd->rev = spi_rd8(hcd, MAX3421_REG_REVISION);  in max3421_spi_thread()
1401 			spi_wr8(hcd, MAX3421_REG_HIEN, max3421_hcd->hien);  in max3421_spi_thread()
1413 			i_worked |= max3421_urb_done(hcd);  in max3421_spi_thread()
1414 		else if (max3421_handle_irqs(hcd))  in max3421_spi_thread()
1417 			i_worked |= max3421_select_and_start_urb(hcd);  in max3421_spi_thread()
1420 			/* reset the HCD: */  in max3421_spi_thread()
1421 			i_worked |= max3421_reset_hcd(hcd);  in max3421_spi_thread()
1424 			spi_wr8(hcd, MAX3421_REG_HCTL,  in max3421_spi_thread()
1429 			i_worked |= max3421_check_unlink(hcd);  in max3421_spi_thread()
1436 				u8 val = spi_rd8(hcd, MAX3421_REG_IOPINS1 + i);  in max3421_spi_thread()
1440 				spi_wr8(hcd, MAX3421_REG_IOPINS1 + i, val);  in max3421_spi_thread()
1452 max3421_reset_port(struct usb_hcd *hcd)  in max3421_reset_port()  argument
1454 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_reset_port()
1465 max3421_reset(struct usb_hcd *hcd)  in max3421_reset()  argument
1467 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_reset()
1469 	hcd->self.sg_tablesize = 0;  in max3421_reset()
1470 	hcd->speed = HCD_USB2;  in max3421_reset()
1471 	hcd->self.root_hub->speed = USB_SPEED_FULL;  in max3421_reset()
1478 max3421_start(struct usb_hcd *hcd)  in max3421_start()  argument
1480 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_start()
1487 	hcd->power_budget = POWER_BUDGET;  in max3421_start()
1488 	hcd->state = HC_STATE_RUNNING;  in max3421_start()
1489 	hcd->uses_new_polling = 1;  in max3421_start()
1494 max3421_stop(struct usb_hcd *hcd)  in max3421_stop()  argument
1499 max3421_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags)  in max3421_urb_enqueue()  argument
1501 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in max3421_urb_enqueue()
1502 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_urb_enqueue()
1538 	retval = usb_hcd_link_urb_to_ep(hcd, urb);  in max3421_urb_enqueue()
1551 max3421_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)  in max3421_urb_dequeue()  argument
1553 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_urb_dequeue()
1563 	retval = usb_hcd_check_unlink_urb(hcd, urb, status);  in max3421_urb_dequeue()
1573 max3421_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *ep)  in max3421_endpoint_disable()  argument
1575 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_endpoint_disable()
1594 max3421_get_frame_number(struct usb_hcd *hcd)  in max3421_get_frame_number()  argument
1596 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_get_frame_number()
1605 max3421_hub_status_data(struct usb_hcd *hcd, char *buf)  in max3421_hub_status_data()  argument
1607 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_hub_status_data()
1612 	if (!HCD_HW_ACCESSIBLE(hcd))  in max3421_hub_status_data()
1618 		dev_dbg(hcd->self.controller,  in max3421_hub_status_data()
1623 			usb_hcd_resume_root_hub(hcd);  in max3421_hub_status_data()
1650 max3421_gpout_set_value(struct usb_hcd *hcd, u8 pin_number, u8 value)  in max3421_gpout_set_value()  argument
1652 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_gpout_set_value()
1671 max3421_hub_control(struct usb_hcd *hcd, u16 type_req, u16 value, u16 index,  in max3421_hub_control()  argument
1674 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in max3421_hub_control()
1675 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_hub_control()
1692 			dev_dbg(hcd->self.controller, "power-off\n");  in max3421_hub_control()
1693 			max3421_gpout_set_value(hcd, pdata->vbus_gpout,  in max3421_hub_control()
1741 			dev_dbg(hcd->self.controller, "power-on\n");  in max3421_hub_control()
1743 			max3421_gpout_set_value(hcd, pdata->vbus_gpout,  in max3421_hub_control()
1747 			max3421_reset_port(hcd);  in max3421_hub_control()
1757 		dev_dbg(hcd->self.controller,  in max3421_hub_control()
1769 max3421_bus_suspend(struct usb_hcd *hcd)  in max3421_bus_suspend()  argument
1775 max3421_bus_resume(struct usb_hcd *hcd)  in max3421_bus_resume()  argument
1825 	struct usb_hcd *hcd = NULL;  in max3421_probe()  local
1870 	hcd = usb_create_hcd(&max3421_hcd_desc, &spi->dev,  in max3421_probe()
1872 	if (!hcd) {  in max3421_probe()
1873 		dev_err(&spi->dev, "failed to create HCD structure\n");  in max3421_probe()
1876 	set_bit(HCD_FLAG_POLL_RH, &hcd->flags);  in max3421_probe()
1877 	max3421_hcd = hcd_to_max3421(hcd);  in max3421_probe()
1888 	max3421_hcd->spi_thread = kthread_run(max3421_spi_thread, hcd,  in max3421_probe()
1896 	retval = usb_add_hcd(hcd, 0, 0);  in max3421_probe()
1898 		dev_err(&spi->dev, "failed to add HCD\n");  in max3421_probe()
1903 			     IRQF_TRIGGER_LOW, "max3421", hcd);  in max3421_probe()
1916 	if (hcd) {  in max3421_probe()
1921 		usb_put_hcd(hcd);  in max3421_probe()
1930 	struct usb_hcd *hcd;  in max3421_remove()  local
1934 	hcd = max3421_to_hcd(max3421_hcd);  in max3421_remove()
1936 	usb_remove_hcd(hcd);  in max3421_remove()
1944 	free_irq(spi->irq, hcd);  in max3421_remove()
1946 	usb_put_hcd(hcd);  in max3421_remove()
1959 		.name	= "max3421-hcd",