usb: gadget: net2280: Add support for PLX USB338X

This patch adds support for the PLX USB3380 and USB3382.

This driver is based on the driver from the manufacturer.

Since USB338X is register compatible with NET2280, I thought that it
would be better to include this hardware into net2280 driver.

Manufacturer's driver only supported the USB33X, did not follow the
Kernel Style and contain some trivial errors. This patch has tried to
address this issues.

This patch has only been tested on USB338x hardware, but the merge has
been done trying to not affect the behaviour of NET2280.

Tested-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 199 insertions, 0 deletions

diff --git a/include/linux/usb/usb338x.h b/include/linux/usb/usb338x.h
new file mode 100644
index 000000000000..f92eb635b9d3
--- /dev/null
+++ b/include/linux/usb/usb338x.h
@@ -0,0 +1,199 @@
+/*
+ * USB 338x super/high/full speed USB device controller.
+ * Unlike many such controllers, this one talks PCI.
+ *
+ * Copyright (C) 2002 NetChip Technology, Inc. (http://www.netchip.com)
+ * Copyright (C) 2003 David Brownell
+ * Copyright (C) 2014 Ricardo Ribalda - Qtechnology/AS
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef __LINUX_USB_USB338X_H
+#define __LINUX_USB_USB338X_H
+
+#include <linux/usb/net2280.h>
+
+/*
+ * Extra defined bits for net2280 registers
+ */
+#define     SCRATCH                           0x0b
+
+#define     DEFECT7374_FSM_FIELD                28
+#define     SUPER_SPEED                          8
+#define     DMA_REQUEST_OUTSTANDING              5
+#define     DMA_PAUSE_DONE_INTERRUPT            26
+#define     SET_ISOCHRONOUS_DELAY               24
+#define     SET_SEL                             22
+#define     SUPER_SPEED_MODE                     8
+
+/*ep_cfg*/
+#define     MAX_BURST_SIZE                      24
+#define     EP_FIFO_BYTE_COUNT                  16
+#define     IN_ENDPOINT_ENABLE                  14
+#define     IN_ENDPOINT_TYPE                    12
+#define     OUT_ENDPOINT_ENABLE                 10
+#define     OUT_ENDPOINT_TYPE                    8
+
+struct usb338x_usb_ext_regs {
+        u32     usbclass;
+#define     DEVICE_PROTOCOL                     16
+#define     DEVICE_SUB_CLASS                     8
+#define     DEVICE_CLASS                         0
+        u32     ss_sel;
+#define     U2_SYSTEM_EXIT_LATENCY               8
+#define     U1_SYSTEM_EXIT_LATENCY               0
+        u32     ss_del;
+#define     U2_DEVICE_EXIT_LATENCY               8
+#define     U1_DEVICE_EXIT_LATENCY               0
+        u32     usb2lpm;
+#define     USB_L1_LPM_HIRD                      2
+#define     USB_L1_LPM_REMOTE_WAKE               1
+#define     USB_L1_LPM_SUPPORT                   0
+        u32     usb3belt;
+#define     BELT_MULTIPLIER                     10
+#define     BEST_EFFORT_LATENCY_TOLERANCE        0
+        u32     usbctl2;
+#define     LTM_ENABLE                           7
+#define     U2_ENABLE                            6
+#define     U1_ENABLE                            5
+#define     FUNCTION_SUSPEND                     4
+#define     USB3_CORE_ENABLE                     3
+#define     USB2_CORE_ENABLE                     2
+#define     SERIAL_NUMBER_STRING_ENABLE          0
+        u32     in_timeout;
+#define     GPEP3_TIMEOUT                       19
+#define     GPEP2_TIMEOUT                       18
+#define     GPEP1_TIMEOUT                       17
+#define     GPEP0_TIMEOUT                       16
+#define     GPEP3_TIMEOUT_VALUE                 13
+#define     GPEP3_TIMEOUT_ENABLE                12
+#define     GPEP2_TIMEOUT_VALUE                  9
+#define     GPEP2_TIMEOUT_ENABLE                 8
+#define     GPEP1_TIMEOUT_VALUE                  5
+#define     GPEP1_TIMEOUT_ENABLE                 4
+#define     GPEP0_TIMEOUT_VALUE                  1
+#define     GPEP0_TIMEOUT_ENABLE                 0
+        u32     isodelay;
+#define     ISOCHRONOUS_DELAY                    0
+} __packed;
+
+struct usb338x_fifo_regs {
+        /* offset 0x0500, 0x0520, 0x0540, 0x0560, 0x0580 */
+        u32     ep_fifo_size_base;
+#define     IN_FIFO_BASE_ADDRESS                                22
+#define     IN_FIFO_SIZE                                        16
+#define     OUT_FIFO_BASE_ADDRESS                               6
+#define     OUT_FIFO_SIZE                                       0
+        u32     ep_fifo_out_wrptr;
+        u32     ep_fifo_out_rdptr;
+        u32     ep_fifo_in_wrptr;
+        u32     ep_fifo_in_rdptr;
+        u32     unused[3];
+} __packed;
+
+
+/* Link layer */
+struct usb338x_ll_regs {
+        /* offset 0x700 */
+        u32   ll_ltssm_ctrl1;
+        u32   ll_ltssm_ctrl2;
+        u32   ll_ltssm_ctrl3;
+        u32   unused[2];
+        u32   ll_general_ctrl0;
+        u32   ll_general_ctrl1;
+#define     PM_U3_AUTO_EXIT                                     29
+#define     PM_U2_AUTO_EXIT                                     28
+#define     PM_U1_AUTO_EXIT                                     27
+#define     PM_FORCE_U2_ENTRY                                   26
+#define     PM_FORCE_U1_ENTRY                                   25
+#define     PM_LGO_COLLISION_SEND_LAU                           24
+#define     PM_DIR_LINK_REJECT                                  23
+#define     PM_FORCE_LINK_ACCEPT                                22
+#define     PM_DIR_ENTRY_U3                                     20
+#define     PM_DIR_ENTRY_U2                                     19
+#define     PM_DIR_ENTRY_U1                                     18
+#define     PM_U2_ENABLE                                        17
+#define     PM_U1_ENABLE                                        16
+#define     SKP_THRESHOLD_ADJUST_FMW                            8
+#define     RESEND_DPP_ON_LRTY_FMW                              7
+#define     DL_BIT_VALUE_FMW                                    6
+#define     FORCE_DL_BIT                                        5
+        u32   ll_general_ctrl2;
+#define     SELECT_INVERT_LANE_POLARITY                         7
+#define     FORCE_INVERT_LANE_POLARITY                          6
+        u32   ll_general_ctrl3;
+        u32   ll_general_ctrl4;
+        u32   ll_error_gen;
+} __packed;
+
+struct usb338x_ll_lfps_regs {
+        /* offset 0x748 */
+        u32   ll_lfps_5;
+#define     TIMER_LFPS_6US                                      16
+        u32   ll_lfps_6;
+#define     TIMER_LFPS_80US                                     0
+} __packed;
+
+struct usb338x_ll_tsn_regs {
+        /* offset 0x77C */
+        u32   ll_tsn_counters_2;
+#define     HOT_TX_NORESET_TS2                                  24
+        u32   ll_tsn_counters_3;
+#define     HOT_RX_RESET_TS2                                    0
+} __packed;
+
+struct usb338x_ll_chi_regs {
+        /* offset 0x79C */
+        u32   ll_tsn_chicken_bit;
+#define     RECOVERY_IDLE_TO_RECOVER_FMW                        3
+} __packed;
+
+/* protocol layer */
+struct usb338x_pl_regs {
+        /* offset 0x800 */
+        u32   pl_reg_1;
+        u32   pl_reg_2;
+        u32   pl_reg_3;
+        u32   pl_reg_4;
+        u32   pl_ep_ctrl;
+        /* Protocol Layer Endpoint Control*/
+#define     PL_EP_CTRL                                  0x810
+#define     ENDPOINT_SELECT                             0
+        /* [4:0] */
+#define     EP_INITIALIZED                              16
+#define     SEQUENCE_NUMBER_RESET                       17
+#define     CLEAR_ACK_ERROR_CODE                        20
+        u32   pl_reg_6;
+        u32   pl_reg_7;
+        u32   pl_reg_8;
+        u32   pl_ep_status_1;
+        /* Protocol Layer Endpoint Status 1*/
+#define     PL_EP_STATUS_1                              0x820
+#define     STATE                                       16
+#define     ACK_GOOD_NORMAL                             0x11
+#define     ACK_GOOD_MORE_ACKS_TO_COME                  0x16
+        u32   pl_ep_status_2;
+        u32   pl_ep_status_3;
+        /* Protocol Layer Endpoint Status 3*/
+#define     PL_EP_STATUS_3                              0x828
+#define     SEQUENCE_NUMBER                             0
+        u32   pl_ep_status_4;
+        /* Protocol Layer Endpoint Status 4*/
+#define     PL_EP_STATUS_4                              0x82c
+        u32   pl_ep_cfg_4;
+        /* Protocol Layer Endpoint Configuration 4*/
+#define     PL_EP_CFG_4                                 0x830
+#define     NON_CTRL_IN_TOLERATE_BAD_DIR                6
+} __packed;
+
+#endif /* __LINUX_USB_USB338X_H */