18  *		For USB HCD implementation.
63 #include <linux/usb/hcd.h>
66 #include <linux/platform_data/max3421-hcd.h>
140 	 * SPI-thread without acquiring the HCD lock:
341 hcd_to_max3421(struct usb_hcd *hcd)  in hcd_to_max3421()  argument
343 	return (struct max3421_hcd *) hcd->hcd_priv;  in hcd_to_max3421()
353 spi_rd8(struct usb_hcd *hcd, unsigned int reg)  in spi_rd8()  argument
355 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in spi_rd8()
356 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in spi_rd8()
379 spi_wr8(struct usb_hcd *hcd, unsigned int reg, u8 val)  in spi_wr8()  argument
381 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in spi_wr8()
382 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in spi_wr8()
403 spi_rd_buf(struct usb_hcd *hcd, unsigned int reg, void *buf, size_t len)  in spi_rd_buf()  argument
405 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in spi_rd_buf()
406 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in spi_rd_buf()
429 spi_wr_buf(struct usb_hcd *hcd, unsigned int reg, void *buf, size_t len)  in spi_wr_buf()  argument
431 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in spi_wr_buf()
432 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in spi_wr_buf()
469 max3421_set_speed(struct usb_hcd *hcd, struct usb_device *dev)  in max3421_set_speed()  argument
471 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_set_speed()
486 		spi_wr8(hcd, MAX3421_REG_MODE, max3421_hcd->mode);  in max3421_set_speed()
492  * Caller must NOT hold HCD spinlock.
495 max3421_set_address(struct usb_hcd *hcd, struct usb_device *dev, int epnum,  in max3421_set_address()  argument
498 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_set_address()
512 		u8 hrsl = spi_rd8(hcd, MAX3421_REG_HRSL);  in max3421_set_address()
517 		/* no locking: HCD (i.e., we) own toggles, don't we? */  in max3421_set_address()
528 	spi_wr8(hcd, MAX3421_REG_HCTL, hctl);  in max3421_set_address()
536 	spi_wr8(hcd, MAX3421_REG_PERADDR, dev->devnum);  in max3421_set_address()
540 max3421_ctrl_setup(struct usb_hcd *hcd, struct urb *urb)  in max3421_ctrl_setup()  argument
542 	spi_wr_buf(hcd, MAX3421_REG_SUDFIFO, urb->setup_packet, 8);  in max3421_ctrl_setup()
547 max3421_transfer_in(struct usb_hcd *hcd, struct urb *urb)  in max3421_transfer_in()  argument
549 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_transfer_in()
558 max3421_transfer_out(struct usb_hcd *hcd, struct urb *urb, int fast_retransmit)  in max3421_transfer_out()  argument
560 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in max3421_transfer_out()
561 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_transfer_out()
571 			spi_wr8(hcd, MAX3421_REG_SNDBC, 0);  in max3421_transfer_out()
572 			spi_wr8(hcd, MAX3421_REG_SNDFIFO, ((u8 *) src)[0]);  in max3421_transfer_out()
573 			spi_wr8(hcd, MAX3421_REG_SNDBC, max3421_hcd->curr_len);  in max3421_transfer_out()
594 	spi_wr_buf(hcd, MAX3421_REG_SNDFIFO, src, max3421_hcd->curr_len);  in max3421_transfer_out()
595 	spi_wr8(hcd, MAX3421_REG_SNDBC, max3421_hcd->curr_len);  in max3421_transfer_out()
601  * Caller must NOT hold HCD spinlock.
604 max3421_next_transfer(struct usb_hcd *hcd, int fast_retransmit)  in max3421_next_transfer()  argument
606 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_next_transfer()
618 		cmd = max3421_ctrl_setup(hcd, urb);  in max3421_next_transfer()
623 			cmd = max3421_transfer_in(hcd, urb);  in max3421_next_transfer()
625 			cmd = max3421_transfer_out(hcd, urb, fast_retransmit);  in max3421_next_transfer()
645 	spi_wr8(hcd, MAX3421_REG_HXFR, cmd);  in max3421_next_transfer()
659  * o Caller must NOT hold HCD spinlock.
664 max3421_select_and_start_urb(struct usb_hcd *hcd)  in max3421_select_and_start_urb()  argument
666 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in max3421_select_and_start_urb()
667 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_select_and_start_urb()
788 	max3421_set_address(hcd, urb->dev, epnum, force_toggles);  in max3421_select_and_start_urb()
789 	max3421_set_speed(hcd, urb->dev);  in max3421_select_and_start_urb()
790 	max3421_next_transfer(hcd, 0);  in max3421_select_and_start_urb()
797  * Caller must NOT hold HCD spinlock.
800 max3421_check_unlink(struct usb_hcd *hcd)  in max3421_check_unlink()  argument
802 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in max3421_check_unlink()
803 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_check_unlink()
818 				usb_hcd_unlink_urb_from_ep(hcd, urb);  in max3421_check_unlink()
821 				usb_hcd_giveback_urb(hcd, urb, 0);  in max3421_check_unlink()
831  * Caller must NOT hold HCD spinlock.
834 max3421_slow_retransmit(struct usb_hcd *hcd)  in max3421_slow_retransmit()  argument
836 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_slow_retransmit()
846  * Caller must NOT hold HCD spinlock.
849 max3421_recv_data_available(struct usb_hcd *hcd)  in max3421_recv_data_available()  argument
851 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_recv_data_available()
856 	rcvbc = spi_rd8(hcd, MAX3421_REG_RCVBC);  in max3421_recv_data_available()
870 		spi_rd_buf(hcd, MAX3421_REG_RCVFIFO, dst, transfer_size);  in max3421_recv_data_available()
876 	spi_wr8(hcd, MAX3421_REG_HIRQ, BIT(MAX3421_HI_RCVDAV_BIT));  in max3421_recv_data_available()
880 max3421_handle_error(struct usb_hcd *hcd, u8 hrsl)  in max3421_handle_error()  argument
882 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in max3421_handle_error()
883 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_handle_error()
925 			spi_wr8(hcd, MAX3421_REG_HCTL,  in max3421_handle_error()
937 			max3421_slow_retransmit(hcd);  in max3421_handle_error()
958 			max3421_next_transfer(hcd, 1);  in max3421_handle_error()
961 			max3421_slow_retransmit(hcd);  in max3421_handle_error()
965 		spi_wr8(hcd, MAX3421_REG_SNDBC, 0);  in max3421_handle_error()
969  * Caller must NOT hold HCD spinlock.
972 max3421_transfer_in_done(struct usb_hcd *hcd, struct urb *urb)  in max3421_transfer_in_done()  argument
974 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in max3421_transfer_in_done()
975 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_transfer_in_done()
1013  * Caller must NOT hold HCD spinlock.
1016 max3421_transfer_out_done(struct usb_hcd *hcd, struct urb *urb)  in max3421_transfer_out_done()  argument
1018 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_transfer_out_done()
1040  * Caller must NOT hold HCD spinlock.
1043 max3421_host_transfer_done(struct usb_hcd *hcd)  in max3421_host_transfer_done()  argument
1045 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_host_transfer_done()
1054 	hrsl = spi_rd8(hcd, MAX3421_REG_HRSL);  in max3421_host_transfer_done()
1064 		max3421_handle_error(hcd, hrsl);  in max3421_host_transfer_done()
1081 			urb_done = max3421_transfer_in_done(hcd, urb);  in max3421_host_transfer_done()
1083 			urb_done = max3421_transfer_out_done(hcd, urb);  in max3421_host_transfer_done()
1102 		max3421_next_transfer(hcd, 0);  in max3421_host_transfer_done()
1106  * Caller must NOT hold HCD spinlock.
1109 max3421_detect_conn(struct usb_hcd *hcd)  in max3421_detect_conn()  argument
1111 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_detect_conn()
1117 	hrsl = spi_rd8(hcd, MAX3421_REG_HRSL);  in max3421_detect_conn()
1148 	spi_wr8(hcd, MAX3421_REG_MODE, max3421_hcd->mode);  in max3421_detect_conn()
1168 	struct usb_hcd *hcd = dev_id;  in max3421_irq_handler()  local
1169 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in max3421_irq_handler()
1170 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_irq_handler()
1183 dump_eps(struct usb_hcd *hcd)  in dump_eps()  argument
1185 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in dump_eps()
1224 max3421_handle_irqs(struct usb_hcd *hcd)  in max3421_handle_irqs()  argument
1226 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_handle_irqs()
1236 	hirq = spi_rd8(hcd, MAX3421_REG_HIRQ);  in max3421_handle_irqs()
1241 	spi_wr8(hcd, MAX3421_REG_HIRQ,  in max3421_handle_irqs()
1252 		max3421_recv_data_available(hcd);  in max3421_handle_irqs()
1255 		max3421_host_transfer_done(hcd);  in max3421_handle_irqs()
1258 		max3421_detect_conn(hcd);  in max3421_handle_irqs()
1261 	 * Now process interrupts that may affect HCD state  in max3421_handle_irqs()
1309 			dump_eps(hcd);  in max3421_handle_irqs()
1317 max3421_reset_hcd(struct usb_hcd *hcd)  in max3421_reset_hcd()  argument
1319 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in max3421_reset_hcd()
1320 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_reset_hcd()
1324 	spi_wr8(hcd, MAX3421_REG_USBCTL, BIT(MAX3421_USBCTL_CHIPRES_BIT));  in max3421_reset_hcd()
1326 	spi_wr8(hcd, MAX3421_REG_USBCTL, 0);  in max3421_reset_hcd()
1329 		if (spi_rd8(hcd, MAX3421_REG_USBIRQ)  in max3421_reset_hcd()
1348 	spi_wr8(hcd, MAX3421_REG_MODE, max3421_hcd->mode);  in max3421_reset_hcd()
1352 	spi_wr8(hcd, MAX3421_REG_HCTL, BIT(MAX3421_HCTL_FRMRST_BIT));  in max3421_reset_hcd()
1355 	spi_wr8(hcd, MAX3421_REG_HCTL, BIT(MAX3421_HCTL_SAMPLEBUS_BIT));  in max3421_reset_hcd()
1356 	max3421_detect_conn(hcd);  in max3421_reset_hcd()
1362 	spi_wr8(hcd, MAX3421_REG_HIEN, max3421_hcd->hien);  in max3421_reset_hcd()
1365 	spi_wr8(hcd, MAX3421_REG_CPUCTL, BIT(MAX3421_CPUCTL_IE_BIT));  in max3421_reset_hcd()
1370 max3421_urb_done(struct usb_hcd *hcd)  in max3421_urb_done()  argument
1372 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_urb_done()
1385 		usb_hcd_unlink_urb_from_ep(hcd, urb);  in max3421_urb_done()
1388 		/* must be called without the HCD spinlock: */  in max3421_urb_done()
1389 		usb_hcd_giveback_urb(hcd, urb, status);  in max3421_urb_done()
1397 	struct usb_hcd *hcd = dev_id;  in max3421_spi_thread()  local
1398 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in max3421_spi_thread()
1399 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_spi_thread()
1403 	spi_wr8(hcd, MAX3421_REG_PINCTL,  in max3421_spi_thread()
1408 		max3421_hcd->rev = spi_rd8(hcd, MAX3421_REG_REVISION);  in max3421_spi_thread()
1425 			spi_wr8(hcd, MAX3421_REG_HIEN, max3421_hcd->hien);  in max3421_spi_thread()
1437 			i_worked |= max3421_urb_done(hcd);  in max3421_spi_thread()
1438 		else if (max3421_handle_irqs(hcd))  in max3421_spi_thread()
1441 			i_worked |= max3421_select_and_start_urb(hcd);  in max3421_spi_thread()
1444 			/* reset the HCD: */  in max3421_spi_thread()
1445 			i_worked |= max3421_reset_hcd(hcd);  in max3421_spi_thread()
1448 			spi_wr8(hcd, MAX3421_REG_HCTL,  in max3421_spi_thread()
1453 			i_worked |= max3421_check_unlink(hcd);  in max3421_spi_thread()
1460 				u8 val = spi_rd8(hcd, MAX3421_REG_IOPINS1);  in max3421_spi_thread()
1464 				spi_wr8(hcd, MAX3421_REG_IOPINS1 + i, val);  in max3421_spi_thread()
1476 max3421_reset_port(struct usb_hcd *hcd)  in max3421_reset_port()  argument
1478 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_reset_port()
1489 max3421_reset(struct usb_hcd *hcd)  in max3421_reset()  argument
1491 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_reset()
1493 	hcd->self.sg_tablesize = 0;  in max3421_reset()
1494 	hcd->speed = HCD_USB2;  in max3421_reset()
1495 	hcd->self.root_hub->speed = USB_SPEED_FULL;  in max3421_reset()
1502 max3421_start(struct usb_hcd *hcd)  in max3421_start()  argument
1504 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_start()
1511 	hcd->power_budget = POWER_BUDGET;  in max3421_start()
1512 	hcd->state = HC_STATE_RUNNING;  in max3421_start()
1513 	hcd->uses_new_polling = 1;  in max3421_start()
1518 max3421_stop(struct usb_hcd *hcd)  in max3421_stop()  argument
1523 max3421_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags)  in max3421_urb_enqueue()  argument
1525 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in max3421_urb_enqueue()
1526 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_urb_enqueue()
1561 	retval = usb_hcd_link_urb_to_ep(hcd, urb);  in max3421_urb_enqueue()
1574 max3421_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)  in max3421_urb_dequeue()  argument
1576 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_urb_dequeue()
1586 	retval = usb_hcd_check_unlink_urb(hcd, urb, status);  in max3421_urb_dequeue()
1596 max3421_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *ep)  in max3421_endpoint_disable()  argument
1598 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_endpoint_disable()
1617 max3421_get_frame_number(struct usb_hcd *hcd)  in max3421_get_frame_number()  argument
1619 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_get_frame_number()
1628 max3421_hub_status_data(struct usb_hcd *hcd, char *buf)  in max3421_hub_status_data()  argument
1630 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_hub_status_data()
1635 	if (!HCD_HW_ACCESSIBLE(hcd))  in max3421_hub_status_data()
1641 		dev_dbg(hcd->self.controller,  in max3421_hub_status_data()
1646 			usb_hcd_resume_root_hub(hcd);  in max3421_hub_status_data()
1673 max3421_gpout_set_value(struct usb_hcd *hcd, u8 pin_number, u8 value)  in max3421_gpout_set_value()  argument
1675 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_gpout_set_value()
1694 max3421_hub_control(struct usb_hcd *hcd, u16 type_req, u16 value, u16 index,  in max3421_hub_control()  argument
1697 	struct spi_device *spi = to_spi_device(hcd->self.controller);  in max3421_hub_control()
1698 	struct max3421_hcd *max3421_hcd = hcd_to_max3421(hcd);  in max3421_hub_control()
1715 			dev_dbg(hcd->self.controller, "power-off\n");  in max3421_hub_control()
1716 			max3421_gpout_set_value(hcd, pdata->vbus_gpout,  in max3421_hub_control()
1764 			dev_dbg(hcd->self.controller, "power-on\n");  in max3421_hub_control()
1766 			max3421_gpout_set_value(hcd, pdata->vbus_gpout,  in max3421_hub_control()
1770 			max3421_reset_port(hcd);  in max3421_hub_control()
1780 		dev_dbg(hcd->self.controller,  in max3421_hub_control()
1792 max3421_bus_suspend(struct usb_hcd *hcd)  in max3421_bus_suspend()  argument
1798 max3421_bus_resume(struct usb_hcd *hcd)  in max3421_bus_resume()  argument
1848 	struct usb_hcd *hcd = NULL;  in max3421_probe()  local
1892 	hcd = usb_create_hcd(&max3421_hcd_desc, &spi->dev,  in max3421_probe()
1894 	if (!hcd) {  in max3421_probe()
1895 		dev_err(&spi->dev, "failed to create HCD structure\n");  in max3421_probe()
1898 	set_bit(HCD_FLAG_POLL_RH, &hcd->flags);  in max3421_probe()
1899 	max3421_hcd = hcd_to_max3421(hcd);  in max3421_probe()
1911 	max3421_hcd->spi_thread = kthread_run(max3421_spi_thread, hcd,  in max3421_probe()
1919 	retval = usb_add_hcd(hcd, 0, 0);  in max3421_probe()
1921 		dev_err(&spi->dev, "failed to add HCD\n");  in max3421_probe()
1926 			     IRQF_TRIGGER_LOW, "max3421", hcd);  in max3421_probe()
1939 	if (hcd) {  in max3421_probe()
1944 		usb_put_hcd(hcd);  in max3421_probe()
1953 	struct usb_hcd *hcd = NULL;  in max3421_remove()  local
1958 		hcd = max3421_to_hcd(max3421_hcd);  in max3421_remove()
1959 		if (hcd->self.controller == &spi->dev)  in max3421_remove()
1963 		dev_err(&spi->dev, "no MAX3421 HCD found for SPI device %p\n",  in max3421_remove()
1968 	usb_remove_hcd(hcd);  in max3421_remove()
1977 	free_irq(spi->irq, hcd);  in max3421_remove()
1979 	usb_put_hcd(hcd);  in max3421_remove()
1993 		.name	= "max3421-hcd",