diff options
Diffstat (limited to 'drivers/net/can/usb/esd_usb.c')
| -rw-r--r-- | drivers/net/can/usb/esd_usb.c | 352 |
1 files changed, 174 insertions, 178 deletions
diff --git a/drivers/net/can/usb/esd_usb.c b/drivers/net/can/usb/esd_usb.c index d33bac3a6c10..6201637ac0ff 100644 --- a/drivers/net/can/usb/esd_usb.c +++ b/drivers/net/can/usb/esd_usb.c @@ -3,18 +3,19 @@ * CAN driver for esd electronics gmbh CAN-USB/2 and CAN-USB/Micro * * Copyright (C) 2010-2012 esd electronic system design gmbh, Matthias Fuchs <socketcan@esd.eu> - * Copyright (C) 2022 esd electronics gmbh, Frank Jungclaus <frank.jungclaus@esd.eu> + * Copyright (C) 2022-2023 esd electronics gmbh, Frank Jungclaus <frank.jungclaus@esd.eu> */ -#include <linux/ethtool.h> -#include <linux/signal.h> -#include <linux/slab.h> -#include <linux/module.h> -#include <linux/netdevice.h> -#include <linux/usb.h> #include <linux/can.h> #include <linux/can/dev.h> #include <linux/can/error.h> +#include <linux/ethtool.h> +#include <linux/module.h> +#include <linux/netdevice.h> +#include <linux/signal.h> +#include <linux/slab.h> +#include <linux/units.h> +#include <linux/usb.h> MODULE_AUTHOR("Matthias Fuchs <socketcan@esd.eu>"); MODULE_AUTHOR("Frank Jungclaus <frank.jungclaus@esd.eu>"); @@ -22,95 +23,87 @@ MODULE_DESCRIPTION("CAN driver for esd electronics gmbh CAN-USB/2 and CAN-USB/Mi MODULE_LICENSE("GPL v2"); /* USB vendor and product ID */ -#define USB_ESDGMBH_VENDOR_ID 0x0ab4 -#define USB_CANUSB2_PRODUCT_ID 0x0010 -#define USB_CANUSBM_PRODUCT_ID 0x0011 +#define ESD_USB_ESDGMBH_VENDOR_ID 0x0ab4 +#define ESD_USB_CANUSB2_PRODUCT_ID 0x0010 +#define ESD_USB_CANUSBM_PRODUCT_ID 0x0011 /* CAN controller clock frequencies */ -#define ESD_USB2_CAN_CLOCK 60000000 -#define ESD_USBM_CAN_CLOCK 36000000 +#define ESD_USB_2_CAN_CLOCK (60 * MEGA) /* Hz */ +#define ESD_USB_M_CAN_CLOCK (36 * MEGA) /* Hz */ /* Maximum number of CAN nets */ #define ESD_USB_MAX_NETS 2 /* USB commands */ -#define CMD_VERSION 1 /* also used for VERSION_REPLY */ -#define CMD_CAN_RX 2 /* device to host only */ -#define CMD_CAN_TX 3 /* also used for TX_DONE */ -#define CMD_SETBAUD 4 /* also used for SETBAUD_REPLY */ -#define CMD_TS 5 /* also used for TS_REPLY */ -#define CMD_IDADD 6 /* also used for IDADD_REPLY */ +#define ESD_USB_CMD_VERSION 1 /* also used for VERSION_REPLY */ +#define ESD_USB_CMD_CAN_RX 2 /* device to host only */ +#define ESD_USB_CMD_CAN_TX 3 /* also used for TX_DONE */ +#define ESD_USB_CMD_SETBAUD 4 /* also used for SETBAUD_REPLY */ +#define ESD_USB_CMD_TS 5 /* also used for TS_REPLY */ +#define ESD_USB_CMD_IDADD 6 /* also used for IDADD_REPLY */ /* esd CAN message flags - dlc field */ -#define ESD_RTR 0x10 +#define ESD_USB_RTR BIT(4) /* esd CAN message flags - id field */ -#define ESD_EXTID 0x20000000 -#define ESD_EVENT 0x40000000 -#define ESD_IDMASK 0x1fffffff +#define ESD_USB_EXTID BIT(29) +#define ESD_USB_EVENT BIT(30) +#define ESD_USB_IDMASK GENMASK(28, 0) /* esd CAN event ids */ -#define ESD_EV_CAN_ERROR_EXT 2 /* CAN controller specific diagnostic data */ +#define ESD_USB_EV_CAN_ERROR_EXT 2 /* CAN controller specific diagnostic data */ /* baudrate message flags */ -#define ESD_USB_UBR 0x80000000 -#define ESD_USB_LOM 0x40000000 -#define ESD_USB_NO_BAUDRATE 0x7fffffff - -/* bit timing CAN-USB/2 */ -#define ESD_USB2_TSEG1_MIN 1 -#define ESD_USB2_TSEG1_MAX 16 -#define ESD_USB2_TSEG1_SHIFT 16 -#define ESD_USB2_TSEG2_MIN 1 -#define ESD_USB2_TSEG2_MAX 8 -#define ESD_USB2_TSEG2_SHIFT 20 -#define ESD_USB2_SJW_MAX 4 -#define ESD_USB2_SJW_SHIFT 14 -#define ESD_USBM_SJW_SHIFT 24 -#define ESD_USB2_BRP_MIN 1 -#define ESD_USB2_BRP_MAX 1024 -#define ESD_USB2_BRP_INC 1 -#define ESD_USB2_3_SAMPLES 0x00800000 +#define ESD_USB_LOM BIT(30) /* Listen Only Mode */ +#define ESD_USB_UBR BIT(31) /* User Bit Rate (controller BTR) in bits 0..27 */ +#define ESD_USB_NO_BAUDRATE GENMASK(30, 0) /* bit rate unconfigured */ + +/* bit timing esd CAN-USB */ +#define ESD_USB_2_TSEG1_SHIFT 16 +#define ESD_USB_2_TSEG2_SHIFT 20 +#define ESD_USB_2_SJW_SHIFT 14 +#define ESD_USB_M_SJW_SHIFT 24 +#define ESD_USB_TRIPLE_SAMPLES BIT(23) /* esd IDADD message */ -#define ESD_ID_ENABLE 0x80 -#define ESD_MAX_ID_SEGMENT 64 +#define ESD_USB_ID_ENABLE BIT(7) +#define ESD_USB_MAX_ID_SEGMENT 64 /* SJA1000 ECC register (emulated by usb firmware) */ -#define SJA1000_ECC_SEG 0x1F -#define SJA1000_ECC_DIR 0x20 -#define SJA1000_ECC_ERR 0x06 -#define SJA1000_ECC_BIT 0x00 -#define SJA1000_ECC_FORM 0x40 -#define SJA1000_ECC_STUFF 0x80 -#define SJA1000_ECC_MASK 0xc0 +#define ESD_USB_SJA1000_ECC_SEG GENMASK(4, 0) +#define ESD_USB_SJA1000_ECC_DIR BIT(5) +#define ESD_USB_SJA1000_ECC_ERR BIT(2, 1) +#define ESD_USB_SJA1000_ECC_BIT 0x00 +#define ESD_USB_SJA1000_ECC_FORM BIT(6) +#define ESD_USB_SJA1000_ECC_STUFF BIT(7) +#define ESD_USB_SJA1000_ECC_MASK GENMASK(7, 6) /* esd bus state event codes */ -#define ESD_BUSSTATE_MASK 0xc0 -#define ESD_BUSSTATE_WARN 0x40 -#define ESD_BUSSTATE_ERRPASSIVE 0x80 -#define ESD_BUSSTATE_BUSOFF 0xc0 +#define ESD_USB_BUSSTATE_MASK GENMASK(7, 6) +#define ESD_USB_BUSSTATE_WARN BIT(6) +#define ESD_USB_BUSSTATE_ERRPASSIVE BIT(7) +#define ESD_USB_BUSSTATE_BUSOFF GENMASK(7, 6) -#define RX_BUFFER_SIZE 1024 -#define MAX_RX_URBS 4 -#define MAX_TX_URBS 16 /* must be power of 2 */ +#define ESD_USB_RX_BUFFER_SIZE 1024 +#define ESD_USB_MAX_RX_URBS 4 +#define ESD_USB_MAX_TX_URBS 16 /* must be power of 2 */ -struct header_msg { - u8 len; /* len is always the total message length in 32bit words */ +struct esd_usb_header_msg { + u8 len; /* total message length in 32bit words */ u8 cmd; u8 rsvd[2]; }; -struct version_msg { - u8 len; +struct esd_usb_version_msg { + u8 len; /* total message length in 32bit words */ u8 cmd; u8 rsvd; u8 flags; __le32 drv_version; }; -struct version_reply_msg { - u8 len; +struct esd_usb_version_reply_msg { + u8 len; /* total message length in 32bit words */ u8 cmd; u8 nets; u8 features; @@ -120,15 +113,15 @@ struct version_reply_msg { __le32 ts; }; -struct rx_msg { - u8 len; +struct esd_usb_rx_msg { + u8 len; /* total message length in 32bit words */ u8 cmd; u8 net; u8 dlc; __le32 ts; __le32 id; /* upper 3 bits contain flags */ union { - u8 data[8]; + u8 data[CAN_MAX_DLEN]; struct { u8 status; /* CAN Controller Status */ u8 ecc; /* Error Capture Register */ @@ -138,18 +131,18 @@ struct rx_msg { }; }; -struct tx_msg { - u8 len; +struct esd_usb_tx_msg { + u8 len; /* total message length in 32bit words */ u8 cmd; u8 net; u8 dlc; u32 hnd; /* opaque handle, not used by device */ __le32 id; /* upper 3 bits contain flags */ - u8 data[8]; + u8 data[CAN_MAX_DLEN]; }; -struct tx_done_msg { - u8 len; +struct esd_usb_tx_done_msg { + u8 len; /* total message length in 32bit words */ u8 cmd; u8 net; u8 status; @@ -157,16 +150,16 @@ struct tx_done_msg { __le32 ts; }; -struct id_filter_msg { - u8 len; +struct esd_usb_id_filter_msg { + u8 len; /* total message length in 32bit words */ u8 cmd; u8 net; u8 option; - __le32 mask[ESD_MAX_ID_SEGMENT + 1]; + __le32 mask[ESD_USB_MAX_ID_SEGMENT + 1]; /* +1 for 29bit extended IDs */ }; -struct set_baudrate_msg { - u8 len; +struct esd_usb_set_baudrate_msg { + u8 len; /* total message length in 32bit words */ u8 cmd; u8 net; u8 rsvd; @@ -175,19 +168,19 @@ struct set_baudrate_msg { /* Main message type used between library and application */ union __packed esd_usb_msg { - struct header_msg hdr; - struct version_msg version; - struct version_reply_msg version_reply; - struct rx_msg rx; - struct tx_msg tx; - struct tx_done_msg txdone; - struct set_baudrate_msg setbaud; - struct id_filter_msg filter; + struct esd_usb_header_msg hdr; + struct esd_usb_version_msg version; + struct esd_usb_version_reply_msg version_reply; + struct esd_usb_rx_msg rx; + struct esd_usb_tx_msg tx; + struct esd_usb_tx_done_msg txdone; + struct esd_usb_set_baudrate_msg setbaud; + struct esd_usb_id_filter_msg filter; }; static struct usb_device_id esd_usb_table[] = { - {USB_DEVICE(USB_ESDGMBH_VENDOR_ID, USB_CANUSB2_PRODUCT_ID)}, - {USB_DEVICE(USB_ESDGMBH_VENDOR_ID, USB_CANUSBM_PRODUCT_ID)}, + {USB_DEVICE(ESD_USB_ESDGMBH_VENDOR_ID, ESD_USB_CANUSB2_PRODUCT_ID)}, + {USB_DEVICE(ESD_USB_ESDGMBH_VENDOR_ID, ESD_USB_CANUSBM_PRODUCT_ID)}, {} }; MODULE_DEVICE_TABLE(usb, esd_usb_table); @@ -208,8 +201,8 @@ struct esd_usb { int net_count; u32 version; int rxinitdone; - void *rxbuf[MAX_RX_URBS]; - dma_addr_t rxbuf_dma[MAX_RX_URBS]; + void *rxbuf[ESD_USB_MAX_RX_URBS]; + dma_addr_t rxbuf_dma[ESD_USB_MAX_RX_URBS]; }; struct esd_usb_net_priv { @@ -217,7 +210,7 @@ struct esd_usb_net_priv { atomic_t active_tx_jobs; struct usb_anchor tx_submitted; - struct esd_tx_urb_context tx_contexts[MAX_TX_URBS]; + struct esd_tx_urb_context tx_contexts[ESD_USB_MAX_TX_URBS]; struct esd_usb *usb; struct net_device *netdev; @@ -232,9 +225,9 @@ static void esd_usb_rx_event(struct esd_usb_net_priv *priv, struct net_device_stats *stats = &priv->netdev->stats; struct can_frame *cf; struct sk_buff *skb; - u32 id = le32_to_cpu(msg->rx.id) & ESD_IDMASK; + u32 id = le32_to_cpu(msg->rx.id) & ESD_USB_IDMASK; - if (id == ESD_EV_CAN_ERROR_EXT) { + if (id == ESD_USB_EV_CAN_ERROR_EXT) { u8 state = msg->rx.ev_can_err_ext.status; u8 ecc = msg->rx.ev_can_err_ext.ecc; @@ -261,15 +254,15 @@ static void esd_usb_rx_event(struct esd_usb_net_priv *priv, priv->old_state = state; - switch (state & ESD_BUSSTATE_MASK) { - case ESD_BUSSTATE_BUSOFF: + switch (state & ESD_USB_BUSSTATE_MASK) { + case ESD_USB_BUSSTATE_BUSOFF: new_state = CAN_STATE_BUS_OFF; can_bus_off(priv->netdev); break; - case ESD_BUSSTATE_WARN: + case ESD_USB_BUSSTATE_WARN: new_state = CAN_STATE_ERROR_WARNING; break; - case ESD_BUSSTATE_ERRPASSIVE: + case ESD_USB_BUSSTATE_ERRPASSIVE: new_state = CAN_STATE_ERROR_PASSIVE; break; default: @@ -291,14 +284,14 @@ static void esd_usb_rx_event(struct esd_usb_net_priv *priv, cf->can_id |= CAN_ERR_PROT | CAN_ERR_BUSERROR; - switch (ecc & SJA1000_ECC_MASK) { - case SJA1000_ECC_BIT: + switch (ecc & ESD_USB_SJA1000_ECC_MASK) { + case ESD_USB_SJA1000_ECC_BIT: cf->data[2] |= CAN_ERR_PROT_BIT; break; - case SJA1000_ECC_FORM: + case ESD_USB_SJA1000_ECC_FORM: cf->data[2] |= CAN_ERR_PROT_FORM; break; - case SJA1000_ECC_STUFF: + case ESD_USB_SJA1000_ECC_STUFF: cf->data[2] |= CAN_ERR_PROT_STUFF; break; default: @@ -306,11 +299,11 @@ static void esd_usb_rx_event(struct esd_usb_net_priv *priv, } /* Error occurred during transmission? */ - if (!(ecc & SJA1000_ECC_DIR)) + if (!(ecc & ESD_USB_SJA1000_ECC_DIR)) cf->data[2] |= CAN_ERR_PROT_TX; /* Bit stream position in CAN frame as the error was detected */ - cf->data[3] = ecc & SJA1000_ECC_SEG; + cf->data[3] = ecc & ESD_USB_SJA1000_ECC_SEG; } if (skb) { @@ -337,7 +330,7 @@ static void esd_usb_rx_can_msg(struct esd_usb_net_priv *priv, id = le32_to_cpu(msg->rx.id); - if (id & ESD_EVENT) { + if (id & ESD_USB_EVENT) { esd_usb_rx_event(priv, msg); } else { skb = alloc_can_skb(priv->netdev, &cf); @@ -346,14 +339,14 @@ static void esd_usb_rx_can_msg(struct esd_usb_net_priv *priv, return; } - cf->can_id = id & ESD_IDMASK; - can_frame_set_cc_len(cf, msg->rx.dlc & ~ESD_RTR, + cf->can_id = id & ESD_USB_IDMASK; + can_frame_set_cc_len(cf, msg->rx.dlc & ~ESD_USB_RTR, priv->can.ctrlmode); - if (id & ESD_EXTID) + if (id & ESD_USB_EXTID) cf->can_id |= CAN_EFF_FLAG; - if (msg->rx.dlc & ESD_RTR) { + if (msg->rx.dlc & ESD_USB_RTR) { cf->can_id |= CAN_RTR_FLAG; } else { for (i = 0; i < cf->len; i++) @@ -377,7 +370,7 @@ static void esd_usb_tx_done_msg(struct esd_usb_net_priv *priv, if (!netif_device_present(netdev)) return; - context = &priv->tx_contexts[msg->txdone.hnd & (MAX_TX_URBS - 1)]; + context = &priv->tx_contexts[msg->txdone.hnd & (ESD_USB_MAX_TX_URBS - 1)]; if (!msg->txdone.status) { stats->tx_packets++; @@ -389,7 +382,7 @@ static void esd_usb_tx_done_msg(struct esd_usb_net_priv *priv, } /* Release context */ - context->echo_index = MAX_TX_URBS; + context->echo_index = ESD_USB_MAX_TX_URBS; atomic_dec(&priv->active_tx_jobs); netif_wake_queue(netdev); @@ -424,7 +417,7 @@ static void esd_usb_read_bulk_callback(struct urb *urb) msg = (union esd_usb_msg *)(urb->transfer_buffer + pos); switch (msg->hdr.cmd) { - case CMD_CAN_RX: + case ESD_USB_CMD_CAN_RX: if (msg->rx.net >= dev->net_count) { dev_err(dev->udev->dev.parent, "format error\n"); break; @@ -433,7 +426,7 @@ static void esd_usb_read_bulk_callback(struct urb *urb) esd_usb_rx_can_msg(dev->nets[msg->rx.net], msg); break; - case CMD_CAN_TX: + case ESD_USB_CMD_CAN_TX: if (msg->txdone.net >= dev->net_count) { dev_err(dev->udev->dev.parent, "format error\n"); break; @@ -444,7 +437,7 @@ static void esd_usb_read_bulk_callback(struct urb *urb) break; } - pos += msg->hdr.len << 2; + pos += msg->hdr.len * sizeof(u32); /* convert to # of bytes */ if (pos > urb->actual_length) { dev_err(dev->udev->dev.parent, "format error\n"); @@ -454,7 +447,7 @@ static void esd_usb_read_bulk_callback(struct urb *urb) resubmit_urb: usb_fill_bulk_urb(urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1), - urb->transfer_buffer, RX_BUFFER_SIZE, + urb->transfer_buffer, ESD_USB_RX_BUFFER_SIZE, esd_usb_read_bulk_callback, dev); retval = usb_submit_urb(urb, GFP_ATOMIC); @@ -538,7 +531,7 @@ static int esd_usb_send_msg(struct esd_usb *dev, union esd_usb_msg *msg) return usb_bulk_msg(dev->udev, usb_sndbulkpipe(dev->udev, 2), msg, - msg->hdr.len << 2, + msg->hdr.len * sizeof(u32), /* convert to # of bytes */ &actual_length, 1000); } @@ -563,7 +556,7 @@ static int esd_usb_setup_rx_urbs(struct esd_usb *dev) if (dev->rxinitdone) return 0; - for (i = 0; i < MAX_RX_URBS; i++) { + for (i = 0; i < ESD_USB_MAX_RX_URBS; i++) { struct urb *urb = NULL; u8 *buf = NULL; dma_addr_t buf_dma; @@ -575,7 +568,7 @@ static int esd_usb_setup_rx_urbs(struct esd_usb *dev) break; } - buf = usb_alloc_coherent(dev->udev, RX_BUFFER_SIZE, GFP_KERNEL, + buf = usb_alloc_coherent(dev->udev, ESD_USB_RX_BUFFER_SIZE, GFP_KERNEL, &buf_dma); if (!buf) { dev_warn(dev->udev->dev.parent, @@ -588,7 +581,7 @@ static int esd_usb_setup_rx_urbs(struct esd_usb *dev) usb_fill_bulk_urb(urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1), - buf, RX_BUFFER_SIZE, + buf, ESD_USB_RX_BUFFER_SIZE, esd_usb_read_bulk_callback, dev); urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; usb_anchor_urb(urb, &dev->rx_submitted); @@ -596,7 +589,7 @@ static int esd_usb_setup_rx_urbs(struct esd_usb *dev) err = usb_submit_urb(urb, GFP_KERNEL); if (err) { usb_unanchor_urb(urb); - usb_free_coherent(dev->udev, RX_BUFFER_SIZE, buf, + usb_free_coherent(dev->udev, ESD_USB_RX_BUFFER_SIZE, buf, urb->transfer_dma); goto freeurb; } @@ -618,7 +611,7 @@ freeurb: } /* Warn if we've couldn't transmit all the URBs */ - if (i < MAX_RX_URBS) { + if (i < ESD_USB_MAX_RX_URBS) { dev_warn(dev->udev->dev.parent, "rx performance may be slow\n"); } @@ -653,14 +646,14 @@ static int esd_usb_start(struct esd_usb_net_priv *priv) * the number of the starting bitmask (0..64) to the filter.option * field followed by only some bitmasks. */ - msg->hdr.cmd = CMD_IDADD; - msg->hdr.len = 2 + ESD_MAX_ID_SEGMENT; + msg->hdr.cmd = ESD_USB_CMD_IDADD; + msg->hdr.len = sizeof(struct esd_usb_id_filter_msg) / sizeof(u32); /* # of 32bit words */ msg->filter.net = priv->index; - msg->filter.option = ESD_ID_ENABLE; /* start with segment 0 */ - for (i = 0; i < ESD_MAX_ID_SEGMENT; i++) - msg->filter.mask[i] = cpu_to_le32(0xffffffff); + msg->filter.option = ESD_USB_ID_ENABLE; /* start with segment 0 */ + for (i = 0; i < ESD_USB_MAX_ID_SEGMENT; i++) + msg->filter.mask[i] = cpu_to_le32(GENMASK(31, 0)); /* enable 29bit extended IDs */ - msg->filter.mask[ESD_MAX_ID_SEGMENT] = cpu_to_le32(0x00000001); + msg->filter.mask[ESD_USB_MAX_ID_SEGMENT] = cpu_to_le32(BIT(0)); err = esd_usb_send_msg(dev, msg); if (err) @@ -689,8 +682,8 @@ static void unlink_all_urbs(struct esd_usb *dev) usb_kill_anchored_urbs(&dev->rx_submitted); - for (i = 0; i < MAX_RX_URBS; ++i) - usb_free_coherent(dev->udev, RX_BUFFER_SIZE, + for (i = 0; i < ESD_USB_MAX_RX_URBS; ++i) + usb_free_coherent(dev->udev, ESD_USB_RX_BUFFER_SIZE, dev->rxbuf[i], dev->rxbuf_dma[i]); for (i = 0; i < dev->net_count; i++) { @@ -699,8 +692,8 @@ static void unlink_all_urbs(struct esd_usb *dev) usb_kill_anchored_urbs(&priv->tx_submitted); atomic_set(&priv->active_tx_jobs, 0); - for (j = 0; j < MAX_TX_URBS; j++) - priv->tx_contexts[j].echo_index = MAX_TX_URBS; + for (j = 0; j < ESD_USB_MAX_TX_URBS; j++) + priv->tx_contexts[j].echo_index = ESD_USB_MAX_TX_URBS; } } } @@ -765,25 +758,27 @@ static netdev_tx_t esd_usb_start_xmit(struct sk_buff *skb, msg = (union esd_usb_msg *)buf; - msg->hdr.len = 3; /* minimal length */ - msg->hdr.cmd = CMD_CAN_TX; + /* minimal length as # of 32bit words */ + msg->hdr.len = offsetof(struct esd_usb_tx_msg, data) / sizeof(u32); + msg->hdr.cmd = ESD_USB_CMD_CAN_TX; msg->tx.net = priv->index; msg->tx.dlc = can_get_cc_dlc(cf, priv->can.ctrlmode); msg->tx.id = cpu_to_le32(cf->can_id & CAN_ERR_MASK); if (cf->can_id & CAN_RTR_FLAG) - msg->tx.dlc |= ESD_RTR; + msg->tx.dlc |= ESD_USB_RTR; if (cf->can_id & CAN_EFF_FLAG) - msg->tx.id |= cpu_to_le32(ESD_EXTID); + msg->tx.id |= cpu_to_le32(ESD_USB_EXTID); for (i = 0; i < cf->len; i++) msg->tx.data[i] = cf->data[i]; - msg->hdr.len += (cf->len + 3) >> 2; + /* round up, then divide by 4 to add the payload length as # of 32bit words */ + msg->hdr.len += DIV_ROUND_UP(cf->len, sizeof(u32)); - for (i = 0; i < MAX_TX_URBS; i++) { - if (priv->tx_contexts[i].echo_index == MAX_TX_URBS) { + for (i = 0; i < ESD_USB_MAX_TX_URBS; i++) { + if (priv->tx_contexts[i].echo_index == ESD_USB_MAX_TX_URBS) { context = &priv->tx_contexts[i]; break; } @@ -800,10 +795,10 @@ static netdev_tx_t esd_usb_start_xmit(struct sk_buff *skb, context->echo_index = i; /* hnd must not be 0 - MSB is stripped in txdone handling */ - msg->tx.hnd = 0x80000000 | i; /* returned in TX done message */ + msg->tx.hnd = BIT(31) | i; /* returned in TX done message */ usb_fill_bulk_urb(urb, dev->udev, usb_sndbulkpipe(dev->udev, 2), buf, - msg->hdr.len << 2, + msg->hdr.len * sizeof(u32), /* convert to # of bytes */ esd_usb_write_bulk_callback, context); urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; @@ -815,7 +810,7 @@ static netdev_tx_t esd_usb_start_xmit(struct sk_buff *skb, atomic_inc(&priv->active_tx_jobs); /* Slow down tx path */ - if (atomic_read(&priv->active_tx_jobs) >= MAX_TX_URBS) + if (atomic_read(&priv->active_tx_jobs) >= ESD_USB_MAX_TX_URBS) netif_stop_queue(netdev); err = usb_submit_urb(urb, GFP_ATOMIC); @@ -865,18 +860,18 @@ static int esd_usb_close(struct net_device *netdev) return -ENOMEM; /* Disable all IDs (see esd_usb_start()) */ - msg->hdr.cmd = CMD_IDADD; - msg->hdr.len = 2 + ESD_MAX_ID_SEGMENT; + msg->hdr.cmd = ESD_USB_CMD_IDADD; + msg->hdr.len = sizeof(struct esd_usb_id_filter_msg) / sizeof(u32);/* # of 32bit words */ msg->filter.net = priv->index; - msg->filter.option = ESD_ID_ENABLE; /* start with segment 0 */ - for (i = 0; i <= ESD_MAX_ID_SEGMENT; i++) + msg->filter.option = ESD_USB_ID_ENABLE; /* start with segment 0 */ + for (i = 0; i <= ESD_USB_MAX_ID_SEGMENT; i++) msg->filter.mask[i] = 0; if (esd_usb_send_msg(priv->usb, msg) < 0) netdev_err(netdev, "sending idadd message failed\n"); /* set CAN controller to reset mode */ - msg->hdr.len = 2; - msg->hdr.cmd = CMD_SETBAUD; + msg->hdr.len = sizeof(struct esd_usb_set_baudrate_msg) / sizeof(u32); /* # of 32bit words */ + msg->hdr.cmd = ESD_USB_CMD_SETBAUD; msg->setbaud.net = priv->index; msg->setbaud.rsvd = 0; msg->setbaud.baud = cpu_to_le32(ESD_USB_NO_BAUDRATE); @@ -905,20 +900,21 @@ static const struct ethtool_ops esd_usb_ethtool_ops = { .get_ts_info = ethtool_op_get_ts_info, }; -static const struct can_bittiming_const esd_usb2_bittiming_const = { - .name = "esd_usb2", - .tseg1_min = ESD_USB2_TSEG1_MIN, - .tseg1_max = ESD_USB2_TSEG1_MAX, - .tseg2_min = ESD_USB2_TSEG2_MIN, - .tseg2_max = ESD_USB2_TSEG2_MAX, - .sjw_max = ESD_USB2_SJW_MAX, - .brp_min = ESD_USB2_BRP_MIN, - .brp_max = ESD_USB2_BRP_MAX, - .brp_inc = ESD_USB2_BRP_INC, +static const struct can_bittiming_const esd_usb_2_bittiming_const = { + .name = "esd_usb_2", + .tseg1_min = 1, + .tseg1_max = 16, + .tseg2_min = 1, + .tseg2_max = 8, + .sjw_max = 4, + .brp_min = 1, + .brp_max = 1024, + .brp_inc = 1, }; -static int esd_usb2_set_bittiming(struct net_device *netdev) +static int esd_usb_2_set_bittiming(struct net_device *netdev) { + const struct can_bittiming_const *btc = &esd_usb_2_bittiming_const; struct esd_usb_net_priv *priv = netdev_priv(netdev); struct can_bittiming *bt = &priv->can.bittiming; union esd_usb_msg *msg; @@ -930,35 +926,35 @@ static int esd_usb2_set_bittiming(struct net_device *netdev) if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) canbtr |= ESD_USB_LOM; - canbtr |= (bt->brp - 1) & (ESD_USB2_BRP_MAX - 1); + canbtr |= (bt->brp - 1) & (btc->brp_max - 1); if (le16_to_cpu(priv->usb->udev->descriptor.idProduct) == - USB_CANUSBM_PRODUCT_ID) - sjw_shift = ESD_USBM_SJW_SHIFT; + ESD_USB_CANUSBM_PRODUCT_ID) + sjw_shift = ESD_USB_M_SJW_SHIFT; else - sjw_shift = ESD_USB2_SJW_SHIFT; + sjw_shift = ESD_USB_2_SJW_SHIFT; - canbtr |= ((bt->sjw - 1) & (ESD_USB2_SJW_MAX - 1)) + canbtr |= ((bt->sjw - 1) & (btc->sjw_max - 1)) << sjw_shift; canbtr |= ((bt->prop_seg + bt->phase_seg1 - 1) - & (ESD_USB2_TSEG1_MAX - 1)) - << ESD_USB2_TSEG1_SHIFT; - canbtr |= ((bt->phase_seg2 - 1) & (ESD_USB2_TSEG2_MAX - 1)) - << ESD_USB2_TSEG2_SHIFT; + & (btc->tseg1_max - 1)) + << ESD_USB_2_TSEG1_SHIFT; + canbtr |= ((bt->phase_seg2 - 1) & (btc->tseg2_max - 1)) + << ESD_USB_2_TSEG2_SHIFT; if (priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES) - canbtr |= ESD_USB2_3_SAMPLES; + canbtr |= ESD_USB_TRIPLE_SAMPLES; msg = kmalloc(sizeof(*msg), GFP_KERNEL); if (!msg) return -ENOMEM; - msg->hdr.len = 2; - msg->hdr.cmd = CMD_SETBAUD; + msg->hdr.len = sizeof(struct esd_usb_set_baudrate_msg) / sizeof(u32); /* # of 32bit words */ + msg->hdr.cmd = ESD_USB_CMD_SETBAUD; msg->setbaud.net = priv->index; msg->setbaud.rsvd = 0; msg->setbaud.baud = cpu_to_le32(canbtr); - netdev_info(netdev, "setting BTR=%#x\n", canbtr); + netdev_dbg(netdev, "setting BTR=%#x\n", canbtr); err = esd_usb_send_msg(priv->usb, msg); @@ -999,7 +995,7 @@ static int esd_usb_probe_one_net(struct usb_interface *intf, int index) int err = 0; int i; - netdev = alloc_candev(sizeof(*priv), MAX_TX_URBS); + netdev = alloc_candev(sizeof(*priv), ESD_USB_MAX_TX_URBS); if (!netdev) { dev_err(&intf->dev, "couldn't alloc candev\n"); err = -ENOMEM; @@ -1011,8 +1007,8 @@ static int esd_usb_probe_one_net(struct usb_interface *intf, int index) init_usb_anchor(&priv->tx_submitted); atomic_set(&priv->active_tx_jobs, 0); - for (i = 0; i < MAX_TX_URBS; i++) - priv->tx_contexts[i].echo_index = MAX_TX_URBS; + for (i = 0; i < ESD_USB_MAX_TX_URBS; i++) + priv->tx_contexts[i].echo_index = ESD_USB_MAX_TX_URBS; priv->usb = dev; priv->netdev = netdev; @@ -1024,15 +1020,15 @@ static int esd_usb_probe_one_net(struct usb_interface *intf, int index) CAN_CTRLMODE_BERR_REPORTING; if (le16_to_cpu(dev->udev->descriptor.idProduct) == - USB_CANUSBM_PRODUCT_ID) - priv->can.clock.freq = ESD_USBM_CAN_CLOCK; + ESD_USB_CANUSBM_PRODUCT_ID) + priv->can.clock.freq = ESD_USB_M_CAN_CLOCK; else { - priv->can.clock.freq = ESD_USB2_CAN_CLOCK; + priv->can.clock.freq = ESD_USB_2_CAN_CLOCK; priv->can.ctrlmode_supported |= CAN_CTRLMODE_3_SAMPLES; } - priv->can.bittiming_const = &esd_usb2_bittiming_const; - priv->can.do_set_bittiming = esd_usb2_set_bittiming; + priv->can.bittiming_const = &esd_usb_2_bittiming_const; + priv->can.do_set_bittiming = esd_usb_2_set_bittiming; priv->can.do_set_mode = esd_usb_set_mode; priv->can.do_get_berr_counter = esd_usb_get_berr_counter; @@ -1090,8 +1086,8 @@ static int esd_usb_probe(struct usb_interface *intf, } /* query number of CAN interfaces (nets) */ - msg->hdr.cmd = CMD_VERSION; - msg->hdr.len = 2; + msg->hdr.cmd = ESD_USB_CMD_VERSION; + msg->hdr.len = sizeof(struct esd_usb_version_msg) / sizeof(u32); /* # of 32bit words */ msg->version.rsvd = 0; msg->version.flags = 0; msg->version.drv_version = 0; |