diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/usb/serial/io_ti.c | 2802 |
1 files changed, 2802 insertions, 0 deletions
diff --git a/drivers/usb/serial/io_ti.c b/drivers/usb/serial/io_ti.c new file mode 100644 index 000000000..03bcab3b9 --- /dev/null +++ b/drivers/usb/serial/io_ti.c @@ -0,0 +1,2802 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Edgeport USB Serial Converter driver + * + * Copyright (C) 2000-2002 Inside Out Networks, All rights reserved. + * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> + * + * Supports the following devices: + * EP/1 EP/2 EP/4 EP/21 EP/22 EP/221 EP/42 EP/421 WATCHPORT + * + * For questions or problems with this driver, contact Inside Out + * Networks technical support, or Peter Berger <pberger@brimson.com>, + * or Al Borchers <alborchers@steinerpoint.com>. + */ + +#include <linux/kernel.h> +#include <linux/jiffies.h> +#include <linux/errno.h> +#include <linux/slab.h> +#include <linux/tty.h> +#include <linux/tty_driver.h> +#include <linux/tty_flip.h> +#include <linux/module.h> +#include <linux/spinlock.h> +#include <linux/mutex.h> +#include <linux/serial.h> +#include <linux/swab.h> +#include <linux/kfifo.h> +#include <linux/ioctl.h> +#include <linux/firmware.h> +#include <linux/uaccess.h> +#include <linux/usb.h> +#include <linux/usb/serial.h> + +#include "io_16654.h" +#include "io_usbvend.h" +#include "io_ti.h" + +#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli" +#define DRIVER_DESC "Edgeport USB Serial Driver" + +#define EPROM_PAGE_SIZE 64 + + +/* different hardware types */ +#define HARDWARE_TYPE_930 0 +#define HARDWARE_TYPE_TIUMP 1 + +/* IOCTL_PRIVATE_TI_GET_MODE Definitions */ +#define TI_MODE_CONFIGURING 0 /* Device has not entered start device */ +#define TI_MODE_BOOT 1 /* Staying in boot mode */ +#define TI_MODE_DOWNLOAD 2 /* Made it to download mode */ +#define TI_MODE_TRANSITIONING 3 /* + * Currently in boot mode but + * transitioning to download mode + */ + +/* read urb state */ +#define EDGE_READ_URB_RUNNING 0 +#define EDGE_READ_URB_STOPPING 1 +#define EDGE_READ_URB_STOPPED 2 + +#define EDGE_CLOSING_WAIT 4000 /* in .01 sec */ + + +/* Product information read from the Edgeport */ +struct product_info { + int TiMode; /* Current TI Mode */ + __u8 hardware_type; /* Type of hardware */ +} __attribute__((packed)); + +/* + * Edgeport firmware header + * + * "build_number" has been set to 0 in all three of the images I have + * seen, and Digi Tech Support suggests that it is safe to ignore it. + * + * "length" is the number of bytes of actual data following the header. + * + * "checksum" is the low order byte resulting from adding the values of + * all the data bytes. + */ +struct edgeport_fw_hdr { + u8 major_version; + u8 minor_version; + __le16 build_number; + __le16 length; + u8 checksum; +} __packed; + +struct edgeport_port { + __u16 uart_base; + __u16 dma_address; + __u8 shadow_msr; + __u8 shadow_mcr; + __u8 shadow_lsr; + __u8 lsr_mask; + __u32 ump_read_timeout; /* + * Number of milliseconds the UMP will + * wait without data before completing + * a read short + */ + int baud_rate; + int close_pending; + int lsr_event; + + struct edgeport_serial *edge_serial; + struct usb_serial_port *port; + __u8 bUartMode; /* Port type, 0: RS232, etc. */ + spinlock_t ep_lock; + int ep_read_urb_state; + int ep_write_urb_in_use; +}; + +struct edgeport_serial { + struct product_info product_info; + u8 TI_I2C_Type; /* Type of I2C in UMP */ + u8 TiReadI2C; /* + * Set to TRUE if we have read the + * I2c in Boot Mode + */ + struct mutex es_lock; + int num_ports_open; + struct usb_serial *serial; + struct delayed_work heartbeat_work; + int fw_version; + bool use_heartbeat; +}; + + +/* Devices that this driver supports */ +static const struct usb_device_id edgeport_1port_id_table[] = { + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) }, + { } +}; + +static const struct usb_device_id edgeport_2port_id_table[] = { + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) }, + /* The 4, 8 and 16 port devices show up as multiple 2 port devices */ + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_E5805A) }, + { } +}; + +/* Devices that this driver supports */ +static const struct usb_device_id id_table_combined[] = { + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_E5805A) }, + { } +}; + +MODULE_DEVICE_TABLE(usb, id_table_combined); + +static int closing_wait = EDGE_CLOSING_WAIT; +static bool ignore_cpu_rev; +static int default_uart_mode; /* RS232 */ + +static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data, + int length); + +static void stop_read(struct edgeport_port *edge_port); +static int restart_read(struct edgeport_port *edge_port); + +static void edge_set_termios(struct tty_struct *tty, + struct usb_serial_port *port, struct ktermios *old_termios); +static void edge_send(struct usb_serial_port *port, struct tty_struct *tty); + +static int do_download_mode(struct edgeport_serial *serial, + const struct firmware *fw); +static int do_boot_mode(struct edgeport_serial *serial, + const struct firmware *fw); + +/* sysfs attributes */ +static int edge_create_sysfs_attrs(struct usb_serial_port *port); +static int edge_remove_sysfs_attrs(struct usb_serial_port *port); + +/* + * Some release of Edgeport firmware "down3.bin" after version 4.80 + * introduced code to automatically disconnect idle devices on some + * Edgeport models after periods of inactivity, typically ~60 seconds. + * This occurs without regard to whether ports on the device are open + * or not. Digi International Tech Support suggested: + * + * 1. Adding driver "heartbeat" code to reset the firmware timer by + * requesting a descriptor record every 15 seconds, which should be + * effective with newer firmware versions that require it, and benign + * with older versions that do not. In practice 40 seconds seems often + * enough. + * 2. The heartbeat code is currently required only on Edgeport/416 models. + */ +#define FW_HEARTBEAT_VERSION_CUTOFF ((4 << 8) + 80) +#define FW_HEARTBEAT_SECS 40 + +/* Timeouts in msecs: firmware downloads take longer */ +#define TI_VSEND_TIMEOUT_DEFAULT 1000 +#define TI_VSEND_TIMEOUT_FW_DOWNLOAD 10000 + +static int ti_vread_sync(struct usb_device *dev, __u8 request, + __u16 value, __u16 index, u8 *data, int size) +{ + int status; + + status = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), request, + (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN), + value, index, data, size, 1000); + if (status < 0) + return status; + if (status != size) { + dev_dbg(&dev->dev, "%s - wanted to write %d, but only wrote %d\n", + __func__, size, status); + return -ECOMM; + } + return 0; +} + +static int ti_vsend_sync(struct usb_device *dev, u8 request, u16 value, + u16 index, u8 *data, int size, int timeout) +{ + int status; + + status = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request, + (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT), + value, index, data, size, timeout); + if (status < 0) + return status; + if (status != size) { + dev_dbg(&dev->dev, "%s - wanted to write %d, but only wrote %d\n", + __func__, size, status); + return -ECOMM; + } + return 0; +} + +static int send_cmd(struct usb_device *dev, __u8 command, + __u8 moduleid, __u16 value, u8 *data, + int size) +{ + return ti_vsend_sync(dev, command, value, moduleid, data, size, + TI_VSEND_TIMEOUT_DEFAULT); +} + +/* clear tx/rx buffers and fifo in TI UMP */ +static int purge_port(struct usb_serial_port *port, __u16 mask) +{ + int port_number = port->port_number; + + dev_dbg(&port->dev, "%s - port %d, mask %x\n", __func__, port_number, mask); + + return send_cmd(port->serial->dev, + UMPC_PURGE_PORT, + (__u8)(UMPM_UART1_PORT + port_number), + mask, + NULL, + 0); +} + +/** + * read_download_mem - Read edgeport memory from TI chip + * @dev: usb device pointer + * @start_address: Device CPU address at which to read + * @length: Length of above data + * @address_type: Can read both XDATA and I2C + * @buffer: pointer to input data buffer + */ +static int read_download_mem(struct usb_device *dev, int start_address, + int length, __u8 address_type, __u8 *buffer) +{ + int status = 0; + __u8 read_length; + u16 be_start_address; + + dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, length); + + /* + * Read in blocks of 64 bytes + * (TI firmware can't handle more than 64 byte reads) + */ + while (length) { + if (length > 64) + read_length = 64; + else + read_length = (__u8)length; + + if (read_length > 1) { + dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, read_length); + } + /* + * NOTE: Must use swab as wIndex is sent in little-endian + * byte order regardless of host byte order. + */ + be_start_address = swab16((u16)start_address); + status = ti_vread_sync(dev, UMPC_MEMORY_READ, + (__u16)address_type, + be_start_address, + buffer, read_length); + + if (status) { + dev_dbg(&dev->dev, "%s - ERROR %x\n", __func__, status); + return status; + } + + if (read_length > 1) + usb_serial_debug_data(&dev->dev, __func__, read_length, buffer); + + /* Update pointers/length */ + start_address += read_length; + buffer += read_length; + length -= read_length; + } + + return status; +} + +static int read_ram(struct usb_device *dev, int start_address, + int length, __u8 *buffer) +{ + return read_download_mem(dev, start_address, length, + DTK_ADDR_SPACE_XDATA, buffer); +} + +/* Read edgeport memory to a given block */ +static int read_boot_mem(struct edgeport_serial *serial, + int start_address, int length, __u8 *buffer) +{ + int status = 0; + int i; + + for (i = 0; i < length; i++) { + status = ti_vread_sync(serial->serial->dev, + UMPC_MEMORY_READ, serial->TI_I2C_Type, + (__u16)(start_address+i), &buffer[i], 0x01); + if (status) { + dev_dbg(&serial->serial->dev->dev, "%s - ERROR %x\n", __func__, status); + return status; + } + } + + dev_dbg(&serial->serial->dev->dev, "%s - start_address = %x, length = %d\n", + __func__, start_address, length); + usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer); + + serial->TiReadI2C = 1; + + return status; +} + +/* Write given block to TI EPROM memory */ +static int write_boot_mem(struct edgeport_serial *serial, + int start_address, int length, __u8 *buffer) +{ + int status = 0; + int i; + u8 *temp; + + /* Must do a read before write */ + if (!serial->TiReadI2C) { + temp = kmalloc(1, GFP_KERNEL); + if (!temp) + return -ENOMEM; + + status = read_boot_mem(serial, 0, 1, temp); + kfree(temp); + if (status) + return status; + } + + for (i = 0; i < length; ++i) { + status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE, + buffer[i], (u16)(i + start_address), NULL, + 0, TI_VSEND_TIMEOUT_DEFAULT); + if (status) + return status; + } + + dev_dbg(&serial->serial->dev->dev, "%s - start_sddr = %x, length = %d\n", __func__, start_address, length); + usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer); + + return status; +} + +/* Write edgeport I2C memory to TI chip */ +static int write_i2c_mem(struct edgeport_serial *serial, + int start_address, int length, __u8 address_type, __u8 *buffer) +{ + struct device *dev = &serial->serial->dev->dev; + int status = 0; + int write_length; + u16 be_start_address; + + /* We can only send a maximum of 1 aligned byte page at a time */ + + /* calculate the number of bytes left in the first page */ + write_length = EPROM_PAGE_SIZE - + (start_address & (EPROM_PAGE_SIZE - 1)); + + if (write_length > length) + write_length = length; + + dev_dbg(dev, "%s - BytesInFirstPage Addr = %x, length = %d\n", + __func__, start_address, write_length); + usb_serial_debug_data(dev, __func__, write_length, buffer); + + /* + * Write first page. + * + * NOTE: Must use swab as wIndex is sent in little-endian byte order + * regardless of host byte order. + */ + be_start_address = swab16((u16)start_address); + status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE, + (u16)address_type, be_start_address, + buffer, write_length, TI_VSEND_TIMEOUT_DEFAULT); + if (status) { + dev_dbg(dev, "%s - ERROR %d\n", __func__, status); + return status; + } + + length -= write_length; + start_address += write_length; + buffer += write_length; + + /* + * We should be aligned now -- can write max page size bytes at a + * time. + */ + while (length) { + if (length > EPROM_PAGE_SIZE) + write_length = EPROM_PAGE_SIZE; + else + write_length = length; + + dev_dbg(dev, "%s - Page Write Addr = %x, length = %d\n", + __func__, start_address, write_length); + usb_serial_debug_data(dev, __func__, write_length, buffer); + + /* + * Write next page. + * + * NOTE: Must use swab as wIndex is sent in little-endian byte + * order regardless of host byte order. + */ + be_start_address = swab16((u16)start_address); + status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE, + (u16)address_type, be_start_address, buffer, + write_length, TI_VSEND_TIMEOUT_DEFAULT); + if (status) { + dev_err(dev, "%s - ERROR %d\n", __func__, status); + return status; + } + + length -= write_length; + start_address += write_length; + buffer += write_length; + } + return status; +} + +/* + * Examine the UMP DMA registers and LSR + * + * Check the MSBit of the X and Y DMA byte count registers. + * A zero in this bit indicates that the TX DMA buffers are empty + * then check the TX Empty bit in the UART. + */ +static int tx_active(struct edgeport_port *port) +{ + int status; + struct out_endpoint_desc_block *oedb; + __u8 *lsr; + int bytes_left = 0; + + oedb = kmalloc(sizeof(*oedb), GFP_KERNEL); + if (!oedb) + return -ENOMEM; + + /* + * Sigh, that's right, just one byte, as not all platforms can + * do DMA from stack + */ + lsr = kmalloc(1, GFP_KERNEL); + if (!lsr) { + kfree(oedb); + return -ENOMEM; + } + /* Read the DMA Count Registers */ + status = read_ram(port->port->serial->dev, port->dma_address, + sizeof(*oedb), (void *)oedb); + if (status) + goto exit_is_tx_active; + + dev_dbg(&port->port->dev, "%s - XByteCount 0x%X\n", __func__, oedb->XByteCount); + + /* and the LSR */ + status = read_ram(port->port->serial->dev, + port->uart_base + UMPMEM_OFFS_UART_LSR, 1, lsr); + + if (status) + goto exit_is_tx_active; + dev_dbg(&port->port->dev, "%s - LSR = 0x%X\n", __func__, *lsr); + + /* If either buffer has data or we are transmitting then return TRUE */ + if ((oedb->XByteCount & 0x80) != 0) + bytes_left += 64; + + if ((*lsr & UMP_UART_LSR_TX_MASK) == 0) + bytes_left += 1; + + /* We return Not Active if we get any kind of error */ +exit_is_tx_active: + dev_dbg(&port->port->dev, "%s - return %d\n", __func__, bytes_left); + + kfree(lsr); + kfree(oedb); + return bytes_left; +} + +static int choose_config(struct usb_device *dev) +{ + /* + * There may be multiple configurations on this device, in which case + * we would need to read and parse all of them to find out which one + * we want. However, we just support one config at this point, + * configuration # 1, which is Config Descriptor 0. + */ + + dev_dbg(&dev->dev, "%s - Number of Interfaces = %d\n", + __func__, dev->config->desc.bNumInterfaces); + dev_dbg(&dev->dev, "%s - MAX Power = %d\n", + __func__, dev->config->desc.bMaxPower * 2); + + if (dev->config->desc.bNumInterfaces != 1) { + dev_err(&dev->dev, "%s - bNumInterfaces is not 1, ERROR!\n", __func__); + return -ENODEV; + } + + return 0; +} + +static int read_rom(struct edgeport_serial *serial, + int start_address, int length, __u8 *buffer) +{ + int status; + + if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) { + status = read_download_mem(serial->serial->dev, + start_address, + length, + serial->TI_I2C_Type, + buffer); + } else { + status = read_boot_mem(serial, start_address, length, + buffer); + } + return status; +} + +static int write_rom(struct edgeport_serial *serial, int start_address, + int length, __u8 *buffer) +{ + if (serial->product_info.TiMode == TI_MODE_BOOT) + return write_boot_mem(serial, start_address, length, + buffer); + + if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) + return write_i2c_mem(serial, start_address, length, + serial->TI_I2C_Type, buffer); + return -EINVAL; +} + +/* Read a descriptor header from I2C based on type */ +static int get_descriptor_addr(struct edgeport_serial *serial, + int desc_type, struct ti_i2c_desc *rom_desc) +{ + int start_address; + int status; + + /* Search for requested descriptor in I2C */ + start_address = 2; + do { + status = read_rom(serial, + start_address, + sizeof(struct ti_i2c_desc), + (__u8 *)rom_desc); + if (status) + return 0; + + if (rom_desc->Type == desc_type) + return start_address; + + start_address = start_address + sizeof(struct ti_i2c_desc) + + le16_to_cpu(rom_desc->Size); + + } while ((start_address < TI_MAX_I2C_SIZE) && rom_desc->Type); + + return 0; +} + +/* Validate descriptor checksum */ +static int valid_csum(struct ti_i2c_desc *rom_desc, __u8 *buffer) +{ + __u16 i; + __u8 cs = 0; + + for (i = 0; i < le16_to_cpu(rom_desc->Size); i++) + cs = (__u8)(cs + buffer[i]); + + if (cs != rom_desc->CheckSum) { + pr_debug("%s - Mismatch %x - %x", __func__, rom_desc->CheckSum, cs); + return -EINVAL; + } + return 0; +} + +/* Make sure that the I2C image is good */ +static int check_i2c_image(struct edgeport_serial *serial) +{ + struct device *dev = &serial->serial->dev->dev; + int status = 0; + struct ti_i2c_desc *rom_desc; + int start_address = 2; + __u8 *buffer; + __u16 ttype; + + rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL); + if (!rom_desc) + return -ENOMEM; + + buffer = kmalloc(TI_MAX_I2C_SIZE, GFP_KERNEL); + if (!buffer) { + kfree(rom_desc); + return -ENOMEM; + } + + /* Read the first byte (Signature0) must be 0x52 or 0x10 */ + status = read_rom(serial, 0, 1, buffer); + if (status) + goto out; + + if (*buffer != UMP5152 && *buffer != UMP3410) { + dev_err(dev, "%s - invalid buffer signature\n", __func__); + status = -ENODEV; + goto out; + } + + do { + /* Validate the I2C */ + status = read_rom(serial, + start_address, + sizeof(struct ti_i2c_desc), + (__u8 *)rom_desc); + if (status) + break; + + if ((start_address + sizeof(struct ti_i2c_desc) + + le16_to_cpu(rom_desc->Size)) > TI_MAX_I2C_SIZE) { + status = -ENODEV; + dev_dbg(dev, "%s - structure too big, erroring out.\n", __func__); + break; + } + + dev_dbg(dev, "%s Type = 0x%x\n", __func__, rom_desc->Type); + + /* Skip type 2 record */ + ttype = rom_desc->Type & 0x0f; + if (ttype != I2C_DESC_TYPE_FIRMWARE_BASIC + && ttype != I2C_DESC_TYPE_FIRMWARE_AUTO) { + /* Read the descriptor data */ + status = read_rom(serial, start_address + + sizeof(struct ti_i2c_desc), + le16_to_cpu(rom_desc->Size), + buffer); + if (status) + break; + + status = valid_csum(rom_desc, buffer); + if (status) + break; + } + start_address = start_address + sizeof(struct ti_i2c_desc) + + le16_to_cpu(rom_desc->Size); + + } while ((rom_desc->Type != I2C_DESC_TYPE_ION) && + (start_address < TI_MAX_I2C_SIZE)); + + if ((rom_desc->Type != I2C_DESC_TYPE_ION) || + (start_address > TI_MAX_I2C_SIZE)) + status = -ENODEV; + +out: + kfree(buffer); + kfree(rom_desc); + return status; +} + +static int get_manuf_info(struct edgeport_serial *serial, __u8 *buffer) +{ + int status; + int start_address; + struct ti_i2c_desc *rom_desc; + struct edge_ti_manuf_descriptor *desc; + struct device *dev = &serial->serial->dev->dev; + + rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL); + if (!rom_desc) + return -ENOMEM; + + start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_ION, + rom_desc); + + if (!start_address) { + dev_dbg(dev, "%s - Edge Descriptor not found in I2C\n", __func__); + status = -ENODEV; + goto exit; + } + + /* Read the descriptor data */ + status = read_rom(serial, start_address+sizeof(struct ti_i2c_desc), + le16_to_cpu(rom_desc->Size), buffer); + if (status) + goto exit; + + status = valid_csum(rom_desc, buffer); + + desc = (struct edge_ti_manuf_descriptor *)buffer; + dev_dbg(dev, "%s - IonConfig 0x%x\n", __func__, desc->IonConfig); + dev_dbg(dev, "%s - Version %d\n", __func__, desc->Version); + dev_dbg(dev, "%s - Cpu/Board 0x%x\n", __func__, desc->CpuRev_BoardRev); + dev_dbg(dev, "%s - NumPorts %d\n", __func__, desc->NumPorts); + dev_dbg(dev, "%s - NumVirtualPorts %d\n", __func__, desc->NumVirtualPorts); + dev_dbg(dev, "%s - TotalPorts %d\n", __func__, desc->TotalPorts); + +exit: + kfree(rom_desc); + return status; +} + +/* Build firmware header used for firmware update */ +static int build_i2c_fw_hdr(u8 *header, const struct firmware *fw) +{ + __u8 *buffer; + int buffer_size; + int i; + __u8 cs = 0; + struct ti_i2c_desc *i2c_header; + struct ti_i2c_image_header *img_header; + struct ti_i2c_firmware_rec *firmware_rec; + struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data; + + /* + * In order to update the I2C firmware we must change the type 2 record + * to type 0xF2. This will force the UMP to come up in Boot Mode. + * Then while in boot mode, the driver will download the latest + * firmware (padded to 15.5k) into the UMP ram. And finally when the + * device comes back up in download mode the driver will cause the new + * firmware to be copied from the UMP Ram to I2C and the firmware will + * update the record type from 0xf2 to 0x02. + */ + + /* + * Allocate a 15.5k buffer + 2 bytes for version number (Firmware + * Record) + */ + buffer_size = (((1024 * 16) - 512 ) + + sizeof(struct ti_i2c_firmware_rec)); + + buffer = kmalloc(buffer_size, GFP_KERNEL); + if (!buffer) + return -ENOMEM; + + /* Set entire image of 0xffs */ + memset(buffer, 0xff, buffer_size); + + /* Copy version number into firmware record */ + firmware_rec = (struct ti_i2c_firmware_rec *)buffer; + + firmware_rec->Ver_Major = fw_hdr->major_version; + firmware_rec->Ver_Minor = fw_hdr->minor_version; + + /* Pointer to fw_down memory image */ + img_header = (struct ti_i2c_image_header *)&fw->data[4]; + + memcpy(buffer + sizeof(struct ti_i2c_firmware_rec), + &fw->data[4 + sizeof(struct ti_i2c_image_header)], + le16_to_cpu(img_header->Length)); + + for (i=0; i < buffer_size; i++) { + cs = (__u8)(cs + buffer[i]); + } + + kfree(buffer); + + /* Build new header */ + i2c_header = (struct ti_i2c_desc *)header; + firmware_rec = (struct ti_i2c_firmware_rec*)i2c_header->Data; + + i2c_header->Type = I2C_DESC_TYPE_FIRMWARE_BLANK; + i2c_header->Size = cpu_to_le16(buffer_size); + i2c_header->CheckSum = cs; + firmware_rec->Ver_Major = fw_hdr->major_version; + firmware_rec->Ver_Minor = fw_hdr->minor_version; + + return 0; +} + +/* Try to figure out what type of I2c we have */ +static int i2c_type_bootmode(struct edgeport_serial *serial) +{ + struct device *dev = &serial->serial->dev->dev; + int status; + u8 *data; + + data = kmalloc(1, GFP_KERNEL); + if (!data) + return -ENOMEM; + + /* Try to read type 2 */ + status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ, + DTK_ADDR_SPACE_I2C_TYPE_II, 0, data, 0x01); + if (status) + dev_dbg(dev, "%s - read 2 status error = %d\n", __func__, status); + else + dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data); + if ((!status) && (*data == UMP5152 || *data == UMP3410)) { + dev_dbg(dev, "%s - ROM_TYPE_II\n", __func__); + serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II; + goto out; + } + + /* Try to read type 3 */ + status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ, + DTK_ADDR_SPACE_I2C_TYPE_III, 0, data, 0x01); + if (status) + dev_dbg(dev, "%s - read 3 status error = %d\n", __func__, status); + else + dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data); + if ((!status) && (*data == UMP5152 || *data == UMP3410)) { + dev_dbg(dev, "%s - ROM_TYPE_III\n", __func__); + serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III; + goto out; + } + + dev_dbg(dev, "%s - Unknown\n", __func__); + serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II; + status = -ENODEV; +out: + kfree(data); + return status; +} + +static int bulk_xfer(struct usb_serial *serial, void *buffer, + int length, int *num_sent) +{ + int status; + + status = usb_bulk_msg(serial->dev, + usb_sndbulkpipe(serial->dev, + serial->port[0]->bulk_out_endpointAddress), + buffer, length, num_sent, 1000); + return status; +} + +/* Download given firmware image to the device (IN BOOT MODE) */ +static int download_code(struct edgeport_serial *serial, __u8 *image, + int image_length) +{ + int status = 0; + int pos; + int transfer; + int done; + + /* Transfer firmware image */ + for (pos = 0; pos < image_length; ) { + /* Read the next buffer from file */ + transfer = image_length - pos; + if (transfer > EDGE_FW_BULK_MAX_PACKET_SIZE) + transfer = EDGE_FW_BULK_MAX_PACKET_SIZE; + + /* Transfer data */ + status = bulk_xfer(serial->serial, &image[pos], + transfer, &done); + if (status) + break; + /* Advance buffer pointer */ + pos += done; + } + + return status; +} + +/* FIXME!!! */ +static int config_boot_dev(struct usb_device *dev) +{ + return 0; +} + +static int ti_cpu_rev(struct edge_ti_manuf_descriptor *desc) +{ + return TI_GET_CPU_REVISION(desc->CpuRev_BoardRev); +} + +static int check_fw_sanity(struct edgeport_serial *serial, + const struct firmware *fw) +{ + u16 length_total; + u8 checksum = 0; + int pos; + struct device *dev = &serial->serial->interface->dev; + struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data; + + if (fw->size < sizeof(struct edgeport_fw_hdr)) { + dev_err(dev, "incomplete fw header\n"); + return -EINVAL; + } + + length_total = le16_to_cpu(fw_hdr->length) + + sizeof(struct edgeport_fw_hdr); + + if (fw->size != length_total) { + dev_err(dev, "bad fw size (expected: %u, got: %zu)\n", + length_total, fw->size); + return -EINVAL; + } + + for (pos = sizeof(struct edgeport_fw_hdr); pos < fw->size; ++pos) + checksum += fw->data[pos]; + + if (checksum != fw_hdr->checksum) { + dev_err(dev, "bad fw checksum (expected: 0x%x, got: 0x%x)\n", + fw_hdr->checksum, checksum); + return -EINVAL; + } + + return 0; +} + +/* + * DownloadTIFirmware - Download run-time operating firmware to the TI5052 + * + * This routine downloads the main operating code into the TI5052, using the + * boot code already burned into E2PROM or ROM. + */ +static int download_fw(struct edgeport_serial *serial) +{ + struct device *dev = &serial->serial->interface->dev; + int status = 0; + struct usb_interface_descriptor *interface; + const struct firmware *fw; + const char *fw_name = "edgeport/down3.bin"; + struct edgeport_fw_hdr *fw_hdr; + + status = request_firmware(&fw, fw_name, dev); + if (status) { + dev_err(dev, "Failed to load image \"%s\" err %d\n", + fw_name, status); + return status; + } + + if (check_fw_sanity(serial, fw)) { + status = -EINVAL; + goto out; + } + + fw_hdr = (struct edgeport_fw_hdr *)fw->data; + + /* If on-board version is newer, "fw_version" will be updated later. */ + serial->fw_version = (fw_hdr->major_version << 8) + + fw_hdr->minor_version; + + /* + * This routine is entered by both the BOOT mode and the Download mode + * We can determine which code is running by the reading the config + * descriptor and if we have only one bulk pipe it is in boot mode + */ + serial->product_info.hardware_type = HARDWARE_TYPE_TIUMP; + + /* Default to type 2 i2c */ + serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II; + + status = choose_config(serial->serial->dev); + if (status) + goto out; + + interface = &serial->serial->interface->cur_altsetting->desc; + if (!interface) { + dev_err(dev, "%s - no interface set, error!\n", __func__); + status = -ENODEV; + goto out; + } + + /* + * Setup initial mode -- the default mode 0 is TI_MODE_CONFIGURING + * if we have more than one endpoint we are definitely in download + * mode + */ + if (interface->bNumEndpoints > 1) { + serial->product_info.TiMode = TI_MODE_DOWNLOAD; + status = do_download_mode(serial, fw); + } else { + /* Otherwise we will remain in configuring mode */ + serial->product_info.TiMode = TI_MODE_CONFIGURING; + status = do_boot_mode(serial, fw); + } + +out: + release_firmware(fw); + return status; +} + +static int do_download_mode(struct edgeport_serial *serial, + const struct firmware *fw) +{ + struct device *dev = &serial->serial->interface->dev; + int status = 0; + int start_address; + struct edge_ti_manuf_descriptor *ti_manuf_desc; + int download_cur_ver; + int download_new_ver; + struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data; + struct ti_i2c_desc *rom_desc; + + dev_dbg(dev, "%s - RUNNING IN DOWNLOAD MODE\n", __func__); + + status = check_i2c_image(serial); + if (status) { + dev_dbg(dev, "%s - DOWNLOAD MODE -- BAD I2C\n", __func__); + return status; + } + + /* + * Validate Hardware version number + * Read Manufacturing Descriptor from TI Based Edgeport + */ + ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL); + if (!ti_manuf_desc) + return -ENOMEM; + + status = get_manuf_info(serial, (__u8 *)ti_manuf_desc); + if (status) { + kfree(ti_manuf_desc); + return status; + } + + /* Check version number of ION descriptor */ + if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) { + dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n", + __func__, ti_cpu_rev(ti_manuf_desc)); + kfree(ti_manuf_desc); + return -EINVAL; + } + + rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL); + if (!rom_desc) { + kfree(ti_manuf_desc); + return -ENOMEM; + } + + /* Search for type 2 record (firmware record) */ + start_address = get_descriptor_addr(serial, + I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc); + if (start_address != 0) { + struct ti_i2c_firmware_rec *firmware_version; + u8 *record; + + dev_dbg(dev, "%s - Found Type FIRMWARE (Type 2) record\n", + __func__); + + firmware_version = kmalloc(sizeof(*firmware_version), + GFP_KERNEL); + if (!firmware_version) { + kfree(rom_desc); + kfree(ti_manuf_desc); + return -ENOMEM; + } + + /* + * Validate version number + * Read the descriptor data + */ + status = read_rom(serial, start_address + + sizeof(struct ti_i2c_desc), + sizeof(struct ti_i2c_firmware_rec), + (__u8 *)firmware_version); + if (status) { + kfree(firmware_version); + kfree(rom_desc); + kfree(ti_manuf_desc); + return status; + } + + /* + * Check version number of download with current + * version in I2c + */ + download_cur_ver = (firmware_version->Ver_Major << 8) + + (firmware_version->Ver_Minor); + download_new_ver = (fw_hdr->major_version << 8) + + (fw_hdr->minor_version); + + dev_dbg(dev, "%s - >> FW Versions Device %d.%d Driver %d.%d\n", + __func__, firmware_version->Ver_Major, + firmware_version->Ver_Minor, + fw_hdr->major_version, fw_hdr->minor_version); + + /* + * Check if we have an old version in the I2C and + * update if necessary + */ + if (download_cur_ver < download_new_ver) { + dev_dbg(dev, "%s - Update I2C dld from %d.%d to %d.%d\n", + __func__, + firmware_version->Ver_Major, + firmware_version->Ver_Minor, + fw_hdr->major_version, + fw_hdr->minor_version); + + record = kmalloc(1, GFP_KERNEL); + if (!record) { + kfree(firmware_version); + kfree(rom_desc); + kfree(ti_manuf_desc); + return -ENOMEM; + } + /* + * In order to update the I2C firmware we must + * change the type 2 record to type 0xF2. This + * will force the UMP to come up in Boot Mode. + * Then while in boot mode, the driver will + * download the latest firmware (padded to + * 15.5k) into the UMP ram. Finally when the + * device comes back up in download mode the + * driver will cause the new firmware to be + * copied from the UMP Ram to I2C and the + * firmware will update the record type from + * 0xf2 to 0x02. + */ + *record = I2C_DESC_TYPE_FIRMWARE_BLANK; + + /* + * Change the I2C Firmware record type to + * 0xf2 to trigger an update + */ + status = write_rom(serial, start_address, + sizeof(*record), record); + if (status) { + kfree(record); + kfree(firmware_version); + kfree(rom_desc); + kfree(ti_manuf_desc); + return status; + } + + /* + * verify the write -- must do this in order + * for write to complete before we do the + * hardware reset + */ + status = read_rom(serial, + start_address, + sizeof(*record), + record); + if (status) { + kfree(record); + kfree(firmware_version); + kfree(rom_desc); + kfree(ti_manuf_desc); + return status; + } + + if (*record != I2C_DESC_TYPE_FIRMWARE_BLANK) { + dev_err(dev, "%s - error resetting device\n", + __func__); + kfree(record); + kfree(firmware_version); + kfree(rom_desc); + kfree(ti_manuf_desc); + return -ENODEV; + } + + dev_dbg(dev, "%s - HARDWARE RESET\n", __func__); + + /* Reset UMP -- Back to BOOT MODE */ + status = ti_vsend_sync(serial->serial->dev, + UMPC_HARDWARE_RESET, + 0, 0, NULL, 0, + TI_VSEND_TIMEOUT_DEFAULT); + + dev_dbg(dev, "%s - HARDWARE RESET return %d\n", + __func__, status); + + /* return an error on purpose. */ + kfree(record); + kfree(firmware_version); + kfree(rom_desc); + kfree(ti_manuf_desc); + return -ENODEV; + } + /* Same or newer fw version is already loaded */ + serial->fw_version = download_cur_ver; + kfree(firmware_version); + } + /* Search for type 0xF2 record (firmware blank record) */ + else { + start_address = get_descriptor_addr(serial, + I2C_DESC_TYPE_FIRMWARE_BLANK, rom_desc); + if (start_address != 0) { +#define HEADER_SIZE (sizeof(struct ti_i2c_desc) + \ + sizeof(struct ti_i2c_firmware_rec)) + __u8 *header; + __u8 *vheader; + + header = kmalloc(HEADER_SIZE, GFP_KERNEL); + if (!header) { + kfree(rom_desc); + kfree(ti_manuf_desc); + return -ENOMEM; + } + + vheader = kmalloc(HEADER_SIZE, GFP_KERNEL); + if (!vheader) { + kfree(header); + kfree(rom_desc); + kfree(ti_manuf_desc); + return -ENOMEM; + } + + dev_dbg(dev, "%s - Found Type BLANK FIRMWARE (Type F2) record\n", + __func__); + + /* + * In order to update the I2C firmware we must change + * the type 2 record to type 0xF2. This will force the + * UMP to come up in Boot Mode. Then while in boot + * mode, the driver will download the latest firmware + * (padded to 15.5k) into the UMP ram. Finally when the + * device comes back up in download mode the driver + * will cause the new firmware to be copied from the + * UMP Ram to I2C and the firmware will update the + * record type from 0xf2 to 0x02. + */ + status = build_i2c_fw_hdr(header, fw); + if (status) { + kfree(vheader); + kfree(header); + kfree(rom_desc); + kfree(ti_manuf_desc); + return -EINVAL; + } + + /* + * Update I2C with type 0xf2 record with correct + * size and checksum + */ + status = write_rom(serial, + start_address, + HEADER_SIZE, + header); + if (status) { + kfree(vheader); + kfree(header); + kfree(rom_desc); + kfree(ti_manuf_desc); + return -EINVAL; + } + + /* + * verify the write -- must do this in order for + * write to complete before we do the hardware reset + */ + status = read_rom(serial, start_address, + HEADER_SIZE, vheader); + + if (status) { + dev_dbg(dev, "%s - can't read header back\n", + __func__); + kfree(vheader); + kfree(header); + kfree(rom_desc); + kfree(ti_manuf_desc); + return status; + } + if (memcmp(vheader, header, HEADER_SIZE)) { + dev_dbg(dev, "%s - write download record failed\n", + __func__); + kfree(vheader); + kfree(header); + kfree(rom_desc); + kfree(ti_manuf_desc); + return -EINVAL; + } + + kfree(vheader); + kfree(header); + + dev_dbg(dev, "%s - Start firmware update\n", __func__); + + /* Tell firmware to copy download image into I2C */ + status = ti_vsend_sync(serial->serial->dev, + UMPC_COPY_DNLD_TO_I2C, + 0, 0, NULL, 0, + TI_VSEND_TIMEOUT_FW_DOWNLOAD); + + dev_dbg(dev, "%s - Update complete 0x%x\n", __func__, + status); + if (status) { + dev_err(dev, + "%s - UMPC_COPY_DNLD_TO_I2C failed\n", + __func__); + kfree(rom_desc); + kfree(ti_manuf_desc); + return status; + } + } + } + + /* The device is running the download code */ + kfree(rom_desc); + kfree(ti_manuf_desc); + return 0; +} + +static int do_boot_mode(struct edgeport_serial *serial, + const struct firmware *fw) +{ + struct device *dev = &serial->serial->interface->dev; + int status = 0; + struct edge_ti_manuf_descriptor *ti_manuf_desc; + struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data; + + dev_dbg(dev, "%s - RUNNING IN BOOT MODE\n", __func__); + + /* Configure the TI device so we can use the BULK pipes for download */ + status = config_boot_dev(serial->serial->dev); + if (status) + return status; + + if (le16_to_cpu(serial->serial->dev->descriptor.idVendor) + != USB_VENDOR_ID_ION) { + dev_dbg(dev, "%s - VID = 0x%x\n", __func__, + le16_to_cpu(serial->serial->dev->descriptor.idVendor)); + serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II; + goto stayinbootmode; + } + + /* + * We have an ION device (I2c Must be programmed) + * Determine I2C image type + */ + if (i2c_type_bootmode(serial)) + goto stayinbootmode; + + /* Check for ION Vendor ID and that the I2C is valid */ + if (!check_i2c_image(serial)) { + struct ti_i2c_image_header *header; + int i; + __u8 cs = 0; + __u8 *buffer; + int buffer_size; + + /* + * Validate Hardware version number + * Read Manufacturing Descriptor from TI Based Edgeport + */ + ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL); + if (!ti_manuf_desc) + return -ENOMEM; + + status = get_manuf_info(serial, (__u8 *)ti_manuf_desc); + if (status) { + kfree(ti_manuf_desc); + goto stayinbootmode; + } + + /* Check for version 2 */ + if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) { + dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n", + __func__, ti_cpu_rev(ti_manuf_desc)); + kfree(ti_manuf_desc); + goto stayinbootmode; + } + + kfree(ti_manuf_desc); + + /* + * In order to update the I2C firmware we must change the type + * 2 record to type 0xF2. This will force the UMP to come up + * in Boot Mode. Then while in boot mode, the driver will + * download the latest firmware (padded to 15.5k) into the + * UMP ram. Finally when the device comes back up in download + * mode the driver will cause the new firmware to be copied + * from the UMP Ram to I2C and the firmware will update the + * record type from 0xf2 to 0x02. + * + * Do we really have to copy the whole firmware image, + * or could we do this in place! + */ + + /* Allocate a 15.5k buffer + 3 byte header */ + buffer_size = (((1024 * 16) - 512) + + sizeof(struct ti_i2c_image_header)); + buffer = kmalloc(buffer_size, GFP_KERNEL); + if (!buffer) + return -ENOMEM; + + /* Initialize the buffer to 0xff (pad the buffer) */ + memset(buffer, 0xff, buffer_size); + memcpy(buffer, &fw->data[4], fw->size - 4); + + for (i = sizeof(struct ti_i2c_image_header); + i < buffer_size; i++) { + cs = (__u8)(cs + buffer[i]); + } + + header = (struct ti_i2c_image_header *)buffer; + + /* update length and checksum after padding */ + header->Length = cpu_to_le16((__u16)(buffer_size - + sizeof(struct ti_i2c_image_header))); + header->CheckSum = cs; + + /* Download the operational code */ + dev_dbg(dev, "%s - Downloading operational code image version %d.%d (TI UMP)\n", + __func__, + fw_hdr->major_version, fw_hdr->minor_version); + status = download_code(serial, buffer, buffer_size); + + kfree(buffer); + + if (status) { + dev_dbg(dev, "%s - Error downloading operational code image\n", __func__); + return status; + } + + /* Device will reboot */ + serial->product_info.TiMode = TI_MODE_TRANSITIONING; + + dev_dbg(dev, "%s - Download successful -- Device rebooting...\n", __func__); + + return 1; + } + +stayinbootmode: + /* Eprom is invalid or blank stay in boot mode */ + dev_dbg(dev, "%s - STAYING IN BOOT MODE\n", __func__); + serial->product_info.TiMode = TI_MODE_BOOT; + + return 1; +} + +static int ti_do_config(struct edgeport_port *port, int feature, int on) +{ + int port_number = port->port->port_number; + + on = !!on; /* 1 or 0 not bitmask */ + return send_cmd(port->port->serial->dev, + feature, (__u8)(UMPM_UART1_PORT + port_number), + on, NULL, 0); +} + +static int restore_mcr(struct edgeport_port *port, __u8 mcr) +{ + int status = 0; + + dev_dbg(&port->port->dev, "%s - %x\n", __func__, mcr); + + status = ti_do_config(port, UMPC_SET_CLR_DTR, mcr & MCR_DTR); + if (status) + return status; + status = ti_do_config(port, UMPC_SET_CLR_RTS, mcr & MCR_RTS); + if (status) + return status; + return ti_do_config(port, UMPC_SET_CLR_LOOPBACK, mcr & MCR_LOOPBACK); +} + +/* Convert TI LSR to standard UART flags */ +static __u8 map_line_status(__u8 ti_lsr) +{ + __u8 lsr = 0; + +#define MAP_FLAG(flagUmp, flagUart) \ + if (ti_lsr & flagUmp) \ + lsr |= flagUart; + + MAP_FLAG(UMP_UART_LSR_OV_MASK, LSR_OVER_ERR) /* overrun */ + MAP_FLAG(UMP_UART_LSR_PE_MASK, LSR_PAR_ERR) /* parity error */ + MAP_FLAG(UMP_UART_LSR_FE_MASK, LSR_FRM_ERR) /* framing error */ + MAP_FLAG(UMP_UART_LSR_BR_MASK, LSR_BREAK) /* break detected */ + MAP_FLAG(UMP_UART_LSR_RX_MASK, LSR_RX_AVAIL) /* rx data available */ + MAP_FLAG(UMP_UART_LSR_TX_MASK, LSR_TX_EMPTY) /* tx hold reg empty */ + +#undef MAP_FLAG + + return lsr; +} + +static void handle_new_msr(struct edgeport_port *edge_port, __u8 msr) +{ + struct async_icount *icount; + struct tty_struct *tty; + + dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, msr); + + if (msr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | + EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) { + icount = &edge_port->port->icount; + + /* update input line counters */ + if (msr & EDGEPORT_MSR_DELTA_CTS) + icount->cts++; + if (msr & EDGEPORT_MSR_DELTA_DSR) + icount->dsr++; + if (msr & EDGEPORT_MSR_DELTA_CD) + icount->dcd++; + if (msr & EDGEPORT_MSR_DELTA_RI) + icount->rng++; + wake_up_interruptible(&edge_port->port->port.delta_msr_wait); + } + + /* Save the new modem status */ + edge_port->shadow_msr = msr & 0xf0; + + tty = tty_port_tty_get(&edge_port->port->port); + /* handle CTS flow control */ + if (tty && C_CRTSCTS(tty)) { + if (msr & EDGEPORT_MSR_CTS) + tty_wakeup(tty); + } + tty_kref_put(tty); +} + +static void handle_new_lsr(struct edgeport_port *edge_port, int lsr_data, + __u8 lsr, __u8 data) +{ + struct async_icount *icount; + __u8 new_lsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR | + LSR_FRM_ERR | LSR_BREAK)); + + dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, new_lsr); + + edge_port->shadow_lsr = lsr; + + if (new_lsr & LSR_BREAK) + /* + * Parity and Framing errors only count if they + * occur exclusive of a break being received. + */ + new_lsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK); + + /* Place LSR data byte into Rx buffer */ + if (lsr_data) + edge_tty_recv(edge_port->port, &data, 1); + + /* update input line counters */ + icount = &edge_port->port->icount; + if (new_lsr & LSR_BREAK) + icount->brk++; + if (new_lsr & LSR_OVER_ERR) + icount->overrun++; + if (new_lsr & LSR_PAR_ERR) + icount->parity++; + if (new_lsr & LSR_FRM_ERR) + icount->frame++; +} + +static void edge_interrupt_callback(struct urb *urb) +{ + struct edgeport_serial *edge_serial = urb->context; + struct usb_serial_port *port; + struct edgeport_port *edge_port; + struct device *dev; + unsigned char *data = urb->transfer_buffer; + int length = urb->actual_length; + int port_number; + int function; + int retval; + __u8 lsr; + __u8 msr; + int status = urb->status; + + switch (status) { + case 0: + /* success */ + break; + case -ECONNRESET: + case -ENOENT: + case -ESHUTDOWN: + /* this urb is terminated, clean up */ + dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", + __func__, status); + return; + default: + dev_err(&urb->dev->dev, "%s - nonzero urb status received: " + "%d\n", __func__, status); + goto exit; + } + + if (!length) { + dev_dbg(&urb->dev->dev, "%s - no data in urb\n", __func__); + goto exit; + } + + dev = &edge_serial->serial->dev->dev; + usb_serial_debug_data(dev, __func__, length, data); + + if (length != 2) { + dev_dbg(dev, "%s - expecting packet of size 2, got %d\n", __func__, length); + goto exit; + } + + port_number = TIUMP_GET_PORT_FROM_CODE(data[0]); + function = TIUMP_GET_FUNC_FROM_CODE(data[0]); + dev_dbg(dev, "%s - port_number %d, function %d, info 0x%x\n", __func__, + port_number, function, data[1]); + + if (port_number >= edge_serial->serial->num_ports) { + dev_err(dev, "bad port number %d\n", port_number); + goto exit; + } + + port = edge_serial->serial->port[port_number]; + edge_port = usb_get_serial_port_data(port); + if (!edge_port) { + dev_dbg(dev, "%s - edge_port not found\n", __func__); + return; + } + switch (function) { + case TIUMP_INTERRUPT_CODE_LSR: + lsr = map_line_status(data[1]); + if (lsr & UMP_UART_LSR_DATA_MASK) { + /* + * Save the LSR event for bulk read completion routine + */ + dev_dbg(dev, "%s - LSR Event Port %u LSR Status = %02x\n", + __func__, port_number, lsr); + edge_port->lsr_event = 1; + edge_port->lsr_mask = lsr; + } else { + dev_dbg(dev, "%s - ===== Port %d LSR Status = %02x ======\n", + __func__, port_number, lsr); + handle_new_lsr(edge_port, 0, lsr, 0); + } + break; + + case TIUMP_INTERRUPT_CODE_MSR: /* MSR */ + /* Copy MSR from UMP */ + msr = data[1]; + dev_dbg(dev, "%s - ===== Port %u MSR Status = %02x ======\n", + __func__, port_number, msr); + handle_new_msr(edge_port, msr); + break; + + default: + dev_err(&urb->dev->dev, + "%s - Unknown Interrupt code from UMP %x\n", + __func__, data[1]); + break; + + } + +exit: + retval = usb_submit_urb(urb, GFP_ATOMIC); + if (retval) + dev_err(&urb->dev->dev, + "%s - usb_submit_urb failed with result %d\n", + __func__, retval); +} + +static void edge_bulk_in_callback(struct urb *urb) +{ + struct edgeport_port *edge_port = urb->context; + struct device *dev = &edge_port->port->dev; + unsigned char *data = urb->transfer_buffer; + unsigned long flags; + int retval = 0; + int port_number; + int status = urb->status; + + switch (status) { + case 0: + /* success */ + break; + case -ECONNRESET: + case -ENOENT: + case -ESHUTDOWN: + /* this urb is terminated, clean up */ + dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status); + return; + default: + dev_err(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n", __func__, status); + } + + if (status == -EPIPE) + goto exit; + + if (status) { + dev_err(&urb->dev->dev, "%s - stopping read!\n", __func__); + return; + } + + port_number = edge_port->port->port_number; + + if (urb->actual_length > 0 && edge_port->lsr_event) { + edge_port->lsr_event = 0; + dev_dbg(dev, "%s ===== Port %u LSR Status = %02x, Data = %02x ======\n", + __func__, port_number, edge_port->lsr_mask, *data); + handle_new_lsr(edge_port, 1, edge_port->lsr_mask, *data); + /* Adjust buffer length/pointer */ + --urb->actual_length; + ++data; + } + + if (urb->actual_length) { + usb_serial_debug_data(dev, __func__, urb->actual_length, data); + if (edge_port->close_pending) + dev_dbg(dev, "%s - close pending, dropping data on the floor\n", + __func__); + else + edge_tty_recv(edge_port->port, data, + urb->actual_length); + edge_port->port->icount.rx += urb->actual_length; + } + +exit: + /* continue read unless stopped */ + spin_lock_irqsave(&edge_port->ep_lock, flags); + if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING) + retval = usb_submit_urb(urb, GFP_ATOMIC); + else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING) + edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED; + + spin_unlock_irqrestore(&edge_port->ep_lock, flags); + if (retval) + dev_err(dev, "%s - usb_submit_urb failed with result %d\n", __func__, retval); +} + +static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data, + int length) +{ + int queued; + + queued = tty_insert_flip_string(&port->port, data, length); + if (queued < length) + dev_err(&port->dev, "%s - dropping data, %d bytes lost\n", + __func__, length - queued); + tty_flip_buffer_push(&port->port); +} + +static void edge_bulk_out_callback(struct urb *urb) +{ + struct usb_serial_port *port = urb->context; + struct edgeport_port *edge_port = usb_get_serial_port_data(port); + int status = urb->status; + struct tty_struct *tty; + + edge_port->ep_write_urb_in_use = 0; + + switch (status) { + case 0: + /* success */ + break; + case -ECONNRESET: + case -ENOENT: + case -ESHUTDOWN: + /* this urb is terminated, clean up */ + dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", + __func__, status); + return; + default: + dev_err_console(port, "%s - nonzero write bulk status " + "received: %d\n", __func__, status); + } + + /* send any buffered data */ + tty = tty_port_tty_get(&port->port); + edge_send(port, tty); + tty_kref_put(tty); +} + +static int edge_open(struct tty_struct *tty, struct usb_serial_port *port) +{ + struct edgeport_port *edge_port = usb_get_serial_port_data(port); + struct edgeport_serial *edge_serial; + struct usb_device *dev; + struct urb *urb; + int port_number; + int status; + u16 open_settings; + u8 transaction_timeout; + + if (edge_port == NULL) + return -ENODEV; + + port_number = port->port_number; + + dev = port->serial->dev; + + /* turn off loopback */ + status = ti_do_config(edge_port, UMPC_SET_CLR_LOOPBACK, 0); + if (status) { + dev_err(&port->dev, + "%s - cannot send clear loopback command, %d\n", + __func__, status); + return status; + } + + /* set up the port settings */ + if (tty) + edge_set_termios(tty, port, &tty->termios); + + /* open up the port */ + + /* milliseconds to timeout for DMA transfer */ + transaction_timeout = 2; + + edge_port->ump_read_timeout = + max(20, ((transaction_timeout * 3) / 2)); + + /* milliseconds to timeout for DMA transfer */ + open_settings = (u8)(UMP_DMA_MODE_CONTINOUS | + UMP_PIPE_TRANS_TIMEOUT_ENA | + (transaction_timeout << 2)); + + dev_dbg(&port->dev, "%s - Sending UMPC_OPEN_PORT\n", __func__); + + /* Tell TI to open and start the port */ + status = send_cmd(dev, UMPC_OPEN_PORT, + (u8)(UMPM_UART1_PORT + port_number), open_settings, NULL, 0); + if (status) { + dev_err(&port->dev, "%s - cannot send open command, %d\n", + __func__, status); + return status; + } + + /* Start the DMA? */ + status = send_cmd(dev, UMPC_START_PORT, + (u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0); + if (status) { + dev_err(&port->dev, "%s - cannot send start DMA command, %d\n", + __func__, status); + return status; + } + + /* Clear TX and RX buffers in UMP */ + status = purge_port(port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN); + if (status) { + dev_err(&port->dev, + "%s - cannot send clear buffers command, %d\n", + __func__, status); + return status; + } + + /* Read Initial MSR */ + status = ti_vread_sync(dev, UMPC_READ_MSR, 0, + (__u16)(UMPM_UART1_PORT + port_number), + &edge_port->shadow_msr, 1); + if (status) { + dev_err(&port->dev, "%s - cannot send read MSR command, %d\n", + __func__, status); + return status; + } + + dev_dbg(&port->dev, "ShadowMSR 0x%X\n", edge_port->shadow_msr); + + /* Set Initial MCR */ + edge_port->shadow_mcr = MCR_RTS | MCR_DTR; + dev_dbg(&port->dev, "ShadowMCR 0x%X\n", edge_port->shadow_mcr); + + edge_serial = edge_port->edge_serial; + if (mutex_lock_interruptible(&edge_serial->es_lock)) + return -ERESTARTSYS; + if (edge_serial->num_ports_open == 0) { + /* we are the first port to open, post the interrupt urb */ + urb = edge_serial->serial->port[0]->interrupt_in_urb; + urb->context = edge_serial; + status = usb_submit_urb(urb, GFP_KERNEL); + if (status) { + dev_err(&port->dev, + "%s - usb_submit_urb failed with value %d\n", + __func__, status); + goto release_es_lock; + } + } + + /* + * reset the data toggle on the bulk endpoints to work around bug in + * host controllers where things get out of sync some times + */ + usb_clear_halt(dev, port->write_urb->pipe); + usb_clear_halt(dev, port->read_urb->pipe); + + /* start up our bulk read urb */ + urb = port->read_urb; + edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING; + urb->context = edge_port; + status = usb_submit_urb(urb, GFP_KERNEL); + if (status) { + dev_err(&port->dev, + "%s - read bulk usb_submit_urb failed with value %d\n", + __func__, status); + goto unlink_int_urb; + } + + ++edge_serial->num_ports_open; + + goto release_es_lock; + +unlink_int_urb: + if (edge_port->edge_serial->num_ports_open == 0) + usb_kill_urb(port->serial->port[0]->interrupt_in_urb); +release_es_lock: + mutex_unlock(&edge_serial->es_lock); + return status; +} + +static void edge_close(struct usb_serial_port *port) +{ + struct edgeport_serial *edge_serial; + struct edgeport_port *edge_port; + struct usb_serial *serial = port->serial; + unsigned long flags; + int port_number; + + edge_serial = usb_get_serial_data(port->serial); + edge_port = usb_get_serial_port_data(port); + if (edge_serial == NULL || edge_port == NULL) + return; + + /* + * The bulkreadcompletion routine will check + * this flag and dump add read data + */ + edge_port->close_pending = 1; + + usb_kill_urb(port->read_urb); + usb_kill_urb(port->write_urb); + edge_port->ep_write_urb_in_use = 0; + spin_lock_irqsave(&edge_port->ep_lock, flags); + kfifo_reset_out(&port->write_fifo); + spin_unlock_irqrestore(&edge_port->ep_lock, flags); + + dev_dbg(&port->dev, "%s - send umpc_close_port\n", __func__); + port_number = port->port_number; + send_cmd(serial->dev, UMPC_CLOSE_PORT, + (__u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0); + + mutex_lock(&edge_serial->es_lock); + --edge_port->edge_serial->num_ports_open; + if (edge_port->edge_serial->num_ports_open <= 0) { + /* last port is now closed, let's shut down our interrupt urb */ + usb_kill_urb(port->serial->port[0]->interrupt_in_urb); + edge_port->edge_serial->num_ports_open = 0; + } + mutex_unlock(&edge_serial->es_lock); + edge_port->close_pending = 0; +} + +static int edge_write(struct tty_struct *tty, struct usb_serial_port *port, + const unsigned char *data, int count) +{ + struct edgeport_port *edge_port = usb_get_serial_port_data(port); + + if (count == 0) { + dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__); + return 0; + } + + if (edge_port == NULL) + return -ENODEV; + if (edge_port->close_pending == 1) + return -ENODEV; + + count = kfifo_in_locked(&port->write_fifo, data, count, + &edge_port->ep_lock); + edge_send(port, tty); + + return count; +} + +static void edge_send(struct usb_serial_port *port, struct tty_struct *tty) +{ + int count, result; + struct edgeport_port *edge_port = usb_get_serial_port_data(port); + unsigned long flags; + + spin_lock_irqsave(&edge_port->ep_lock, flags); + + if (edge_port->ep_write_urb_in_use) { + spin_unlock_irqrestore(&edge_port->ep_lock, flags); + return; + } + + count = kfifo_out(&port->write_fifo, + port->write_urb->transfer_buffer, + port->bulk_out_size); + + if (count == 0) { + spin_unlock_irqrestore(&edge_port->ep_lock, flags); + return; + } + + edge_port->ep_write_urb_in_use = 1; + + spin_unlock_irqrestore(&edge_port->ep_lock, flags); + + usb_serial_debug_data(&port->dev, __func__, count, port->write_urb->transfer_buffer); + + /* set up our urb */ + port->write_urb->transfer_buffer_length = count; + + /* send the data out the bulk port */ + result = usb_submit_urb(port->write_urb, GFP_ATOMIC); + if (result) { + dev_err_console(port, + "%s - failed submitting write urb, error %d\n", + __func__, result); + edge_port->ep_write_urb_in_use = 0; + /* TODO: reschedule edge_send */ + } else + edge_port->port->icount.tx += count; + + /* + * wakeup any process waiting for writes to complete + * there is now more room in the buffer for new writes + */ + if (tty) + tty_wakeup(tty); +} + +static int edge_write_room(struct tty_struct *tty) +{ + struct usb_serial_port *port = tty->driver_data; + struct edgeport_port *edge_port = usb_get_serial_port_data(port); + int room = 0; + unsigned long flags; + + if (edge_port == NULL) + return 0; + if (edge_port->close_pending == 1) + return 0; + + spin_lock_irqsave(&edge_port->ep_lock, flags); + room = kfifo_avail(&port->write_fifo); + spin_unlock_irqrestore(&edge_port->ep_lock, flags); + + dev_dbg(&port->dev, "%s - returns %d\n", __func__, room); + return room; +} + +static int edge_chars_in_buffer(struct tty_struct *tty) +{ + struct usb_serial_port *port = tty->driver_data; + struct edgeport_port *edge_port = usb_get_serial_port_data(port); + int chars = 0; + unsigned long flags; + if (edge_port == NULL) + return 0; + + spin_lock_irqsave(&edge_port->ep_lock, flags); + chars = kfifo_len(&port->write_fifo); + spin_unlock_irqrestore(&edge_port->ep_lock, flags); + + dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); + return chars; +} + +static bool edge_tx_empty(struct usb_serial_port *port) +{ + struct edgeport_port *edge_port = usb_get_serial_port_data(port); + int ret; + + ret = tx_active(edge_port); + if (ret > 0) + return false; + + return true; +} + +static void edge_throttle(struct tty_struct *tty) +{ + struct usb_serial_port *port = tty->driver_data; + struct edgeport_port *edge_port = usb_get_serial_port_data(port); + int status; + + if (edge_port == NULL) + return; + + /* if we are implementing XON/XOFF, send the stop character */ + if (I_IXOFF(tty)) { + unsigned char stop_char = STOP_CHAR(tty); + status = edge_write(tty, port, &stop_char, 1); + if (status <= 0) { + dev_err(&port->dev, "%s - failed to write stop character, %d\n", __func__, status); + } + } + + /* + * if we are implementing RTS/CTS, stop reads + * and the Edgeport will clear the RTS line + */ + if (C_CRTSCTS(tty)) + stop_read(edge_port); + +} + +static void edge_unthrottle(struct tty_struct *tty) +{ + struct usb_serial_port *port = tty->driver_data; + struct edgeport_port *edge_port = usb_get_serial_port_data(port); + int status; + + if (edge_port == NULL) + return; + + /* if we are implementing XON/XOFF, send the start character */ + if (I_IXOFF(tty)) { + unsigned char start_char = START_CHAR(tty); + status = edge_write(tty, port, &start_char, 1); + if (status <= 0) { + dev_err(&port->dev, "%s - failed to write start character, %d\n", __func__, status); + } + } + /* + * if we are implementing RTS/CTS, restart reads + * are the Edgeport will assert the RTS line + */ + if (C_CRTSCTS(tty)) { + status = restart_read(edge_port); + if (status) + dev_err(&port->dev, + "%s - read bulk usb_submit_urb failed: %d\n", + __func__, status); + } + +} + +static void stop_read(struct edgeport_port *edge_port) +{ + unsigned long flags; + + spin_lock_irqsave(&edge_port->ep_lock, flags); + + if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING) + edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING; + edge_port->shadow_mcr &= ~MCR_RTS; + + spin_unlock_irqrestore(&edge_port->ep_lock, flags); +} + +static int restart_read(struct edgeport_port *edge_port) +{ + struct urb *urb; + int status = 0; + unsigned long flags; + + spin_lock_irqsave(&edge_port->ep_lock, flags); + + if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) { + urb = edge_port->port->read_urb; + status = usb_submit_urb(urb, GFP_ATOMIC); + } + edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING; + edge_port->shadow_mcr |= MCR_RTS; + + spin_unlock_irqrestore(&edge_port->ep_lock, flags); + + return status; +} + +static void change_port_settings(struct tty_struct *tty, + struct edgeport_port *edge_port, struct ktermios *old_termios) +{ + struct device *dev = &edge_port->port->dev; + struct ump_uart_config *config; + int baud; + unsigned cflag; + int status; + int port_number = edge_port->port->port_number; + + config = kmalloc (sizeof (*config), GFP_KERNEL); + if (!config) { + tty->termios = *old_termios; + return; + } + + cflag = tty->termios.c_cflag; + + config->wFlags = 0; + + /* These flags must be set */ + config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT; + config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR; + config->bUartMode = (__u8)(edge_port->bUartMode); + + switch (cflag & CSIZE) { + case CS5: + config->bDataBits = UMP_UART_CHAR5BITS; + dev_dbg(dev, "%s - data bits = 5\n", __func__); + break; + case CS6: + config->bDataBits = UMP_UART_CHAR6BITS; + dev_dbg(dev, "%s - data bits = 6\n", __func__); + break; + case CS7: + config->bDataBits = UMP_UART_CHAR7BITS; + dev_dbg(dev, "%s - data bits = 7\n", __func__); + break; + default: + case CS8: + config->bDataBits = UMP_UART_CHAR8BITS; + dev_dbg(dev, "%s - data bits = 8\n", __func__); + break; + } + + if (cflag & PARENB) { + if (cflag & PARODD) { + config->wFlags |= UMP_MASK_UART_FLAGS_PARITY; + config->bParity = UMP_UART_ODDPARITY; + dev_dbg(dev, "%s - parity = odd\n", __func__); + } else { + config->wFlags |= UMP_MASK_UART_FLAGS_PARITY; + config->bParity = UMP_UART_EVENPARITY; + dev_dbg(dev, "%s - parity = even\n", __func__); + } + } else { + config->bParity = UMP_UART_NOPARITY; + dev_dbg(dev, "%s - parity = none\n", __func__); + } + + if (cflag & CSTOPB) { + config->bStopBits = UMP_UART_STOPBIT2; + dev_dbg(dev, "%s - stop bits = 2\n", __func__); + } else { + config->bStopBits = UMP_UART_STOPBIT1; + dev_dbg(dev, "%s - stop bits = 1\n", __func__); + } + + /* figure out the flow control settings */ + if (cflag & CRTSCTS) { + config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW; + config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW; + dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__); + } else { + dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__); + restart_read(edge_port); + } + + /* + * if we are implementing XON/XOFF, set the start and stop + * character in the device + */ + config->cXon = START_CHAR(tty); + config->cXoff = STOP_CHAR(tty); + + /* if we are implementing INBOUND XON/XOFF */ + if (I_IXOFF(tty)) { + config->wFlags |= UMP_MASK_UART_FLAGS_IN_X; + dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n", + __func__, config->cXon, config->cXoff); + } else + dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__); + + /* if we are implementing OUTBOUND XON/XOFF */ + if (I_IXON(tty)) { + config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X; + dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n", + __func__, config->cXon, config->cXoff); + } else + dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__); + + tty->termios.c_cflag &= ~CMSPAR; + + /* Round the baud rate */ + baud = tty_get_baud_rate(tty); + if (!baud) { + /* pick a default, any default... */ + baud = 9600; + } else { + /* Avoid a zero divisor. */ + baud = min(baud, 461550); + tty_encode_baud_rate(tty, baud, baud); + } + + edge_port->baud_rate = baud; + config->wBaudRate = (__u16)((461550L + baud/2) / baud); + + /* FIXME: Recompute actual baud from divisor here */ + + dev_dbg(dev, "%s - baud rate = %d, wBaudRate = %d\n", __func__, baud, config->wBaudRate); + + dev_dbg(dev, "wBaudRate: %d\n", (int)(461550L / config->wBaudRate)); + dev_dbg(dev, "wFlags: 0x%x\n", config->wFlags); + dev_dbg(dev, "bDataBits: %d\n", config->bDataBits); + dev_dbg(dev, "bParity: %d\n", config->bParity); + dev_dbg(dev, "bStopBits: %d\n", config->bStopBits); + dev_dbg(dev, "cXon: %d\n", config->cXon); + dev_dbg(dev, "cXoff: %d\n", config->cXoff); + dev_dbg(dev, "bUartMode: %d\n", config->bUartMode); + + /* move the word values into big endian mode */ + cpu_to_be16s(&config->wFlags); + cpu_to_be16s(&config->wBaudRate); + + status = send_cmd(edge_port->port->serial->dev, UMPC_SET_CONFIG, + (__u8)(UMPM_UART1_PORT + port_number), + 0, (__u8 *)config, sizeof(*config)); + if (status) + dev_dbg(dev, "%s - error %d when trying to write config to device\n", + __func__, status); + kfree(config); +} + +static void edge_set_termios(struct tty_struct *tty, + struct usb_serial_port *port, struct ktermios *old_termios) +{ + struct edgeport_port *edge_port = usb_get_serial_port_data(port); + + if (edge_port == NULL) + return; + /* change the port settings to the new ones specified */ + change_port_settings(tty, edge_port, old_termios); +} + +static int edge_tiocmset(struct tty_struct *tty, + unsigned int set, unsigned int clear) +{ + struct usb_serial_port *port = tty->driver_data; + struct edgeport_port *edge_port = usb_get_serial_port_data(port); + unsigned int mcr; + unsigned long flags; + + spin_lock_irqsave(&edge_port->ep_lock, flags); + mcr = edge_port->shadow_mcr; + if (set & TIOCM_RTS) + mcr |= MCR_RTS; + if (set & TIOCM_DTR) + mcr |= MCR_DTR; + if (set & TIOCM_LOOP) + mcr |= MCR_LOOPBACK; + + if (clear & TIOCM_RTS) + mcr &= ~MCR_RTS; + if (clear & TIOCM_DTR) + mcr &= ~MCR_DTR; + if (clear & TIOCM_LOOP) + mcr &= ~MCR_LOOPBACK; + + edge_port->shadow_mcr = mcr; + spin_unlock_irqrestore(&edge_port->ep_lock, flags); + + restore_mcr(edge_port, mcr); + return 0; +} + +static int edge_tiocmget(struct tty_struct *tty) +{ + struct usb_serial_port *port = tty->driver_data; + struct edgeport_port *edge_port = usb_get_serial_port_data(port); + unsigned int result = 0; + unsigned int msr; + unsigned int mcr; + unsigned long flags; + + spin_lock_irqsave(&edge_port->ep_lock, flags); + + msr = edge_port->shadow_msr; + mcr = edge_port->shadow_mcr; + result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */ + | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */ + | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */ + | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */ + | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */ + | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */ + + + dev_dbg(&port->dev, "%s -- %x\n", __func__, result); + spin_unlock_irqrestore(&edge_port->ep_lock, flags); + + return result; +} + +static int get_serial_info(struct tty_struct *tty, + struct serial_struct *ss) +{ + struct usb_serial_port *port = tty->driver_data; + struct edgeport_port *edge_port = usb_get_serial_port_data(port); + unsigned cwait; + + cwait = edge_port->port->port.closing_wait; + if (cwait != ASYNC_CLOSING_WAIT_NONE) + cwait = jiffies_to_msecs(cwait) / 10; + + ss->type = PORT_16550A; + ss->line = edge_port->port->minor; + ss->port = edge_port->port->port_number; + ss->irq = 0; + ss->xmit_fifo_size = edge_port->port->bulk_out_size; + ss->baud_base = 9600; + ss->close_delay = 5*HZ; + ss->closing_wait = cwait; + return 0; +} + +static void edge_break(struct tty_struct *tty, int break_state) +{ + struct usb_serial_port *port = tty->driver_data; + struct edgeport_port *edge_port = usb_get_serial_port_data(port); + int status; + int bv = 0; /* Off */ + + if (break_state == -1) + bv = 1; /* On */ + status = ti_do_config(edge_port, UMPC_SET_CLR_BREAK, bv); + if (status) + dev_dbg(&port->dev, "%s - error %d sending break set/clear command.\n", + __func__, status); +} + +static void edge_heartbeat_schedule(struct edgeport_serial *edge_serial) +{ + if (!edge_serial->use_heartbeat) + return; + + schedule_delayed_work(&edge_serial->heartbeat_work, + FW_HEARTBEAT_SECS * HZ); +} + +static void edge_heartbeat_work(struct work_struct *work) +{ + struct edgeport_serial *serial; + struct ti_i2c_desc *rom_desc; + + serial = container_of(work, struct edgeport_serial, + heartbeat_work.work); + + rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL); + + /* Descriptor address request is enough to reset the firmware timer */ + if (!rom_desc || !get_descriptor_addr(serial, I2C_DESC_TYPE_ION, + rom_desc)) { + dev_err(&serial->serial->interface->dev, + "%s - Incomplete heartbeat\n", __func__); + } + kfree(rom_desc); + + edge_heartbeat_schedule(serial); +} + +static int edge_calc_num_ports(struct usb_serial *serial, + struct usb_serial_endpoints *epds) +{ + struct device *dev = &serial->interface->dev; + unsigned char num_ports = serial->type->num_ports; + + /* Make sure we have the required endpoints when in download mode. */ + if (serial->interface->cur_altsetting->desc.bNumEndpoints > 1) { + if (epds->num_bulk_in < num_ports || + epds->num_bulk_out < num_ports || + epds->num_interrupt_in < 1) { + dev_err(dev, "required endpoints missing\n"); + return -ENODEV; + } + } + + return num_ports; +} + +static int edge_startup(struct usb_serial *serial) +{ + struct edgeport_serial *edge_serial; + int status; + u16 product_id; + + /* create our private serial structure */ + edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL); + if (!edge_serial) + return -ENOMEM; + + mutex_init(&edge_serial->es_lock); + edge_serial->serial = serial; + INIT_DELAYED_WORK(&edge_serial->heartbeat_work, edge_heartbeat_work); + usb_set_serial_data(serial, edge_serial); + + status = download_fw(edge_serial); + if (status < 0) { + kfree(edge_serial); + return status; + } + + if (status > 0) + return 1; /* bind but do not register any ports */ + + product_id = le16_to_cpu( + edge_serial->serial->dev->descriptor.idProduct); + + /* Currently only the EP/416 models require heartbeat support */ + if (edge_serial->fw_version > FW_HEARTBEAT_VERSION_CUTOFF) { + if (product_id == ION_DEVICE_ID_TI_EDGEPORT_416 || + product_id == ION_DEVICE_ID_TI_EDGEPORT_416B) { + edge_serial->use_heartbeat = true; + } + } + + edge_heartbeat_schedule(edge_serial); + + return 0; +} + +static void edge_disconnect(struct usb_serial *serial) +{ + struct edgeport_serial *edge_serial = usb_get_serial_data(serial); + + cancel_delayed_work_sync(&edge_serial->heartbeat_work); +} + +static void edge_release(struct usb_serial *serial) +{ + struct edgeport_serial *edge_serial = usb_get_serial_data(serial); + + cancel_delayed_work_sync(&edge_serial->heartbeat_work); + kfree(edge_serial); +} + +static int edge_port_probe(struct usb_serial_port *port) +{ + struct edgeport_port *edge_port; + int ret; + + edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL); + if (!edge_port) + return -ENOMEM; + + spin_lock_init(&edge_port->ep_lock); + edge_port->port = port; + edge_port->edge_serial = usb_get_serial_data(port->serial); + edge_port->bUartMode = default_uart_mode; + + switch (port->port_number) { + case 0: + edge_port->uart_base = UMPMEM_BASE_UART1; + edge_port->dma_address = UMPD_OEDB1_ADDRESS; + break; + case 1: + edge_port->uart_base = UMPMEM_BASE_UART2; + edge_port->dma_address = UMPD_OEDB2_ADDRESS; + break; + default: + dev_err(&port->dev, "unknown port number\n"); + ret = -ENODEV; + goto err; + } + + dev_dbg(&port->dev, + "%s - port_number = %d, uart_base = %04x, dma_address = %04x\n", + __func__, port->port_number, edge_port->uart_base, + edge_port->dma_address); + + usb_set_serial_port_data(port, edge_port); + + ret = edge_create_sysfs_attrs(port); + if (ret) + goto err; + + port->port.closing_wait = msecs_to_jiffies(closing_wait * 10); + port->port.drain_delay = 1; + + return 0; +err: + kfree(edge_port); + + return ret; +} + +static int edge_port_remove(struct usb_serial_port *port) +{ + struct edgeport_port *edge_port; + + edge_port = usb_get_serial_port_data(port); + edge_remove_sysfs_attrs(port); + kfree(edge_port); + + return 0; +} + +/* Sysfs Attributes */ + +static ssize_t uart_mode_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct usb_serial_port *port = to_usb_serial_port(dev); + struct edgeport_port *edge_port = usb_get_serial_port_data(port); + + return sprintf(buf, "%d\n", edge_port->bUartMode); +} + +static ssize_t uart_mode_store(struct device *dev, + struct device_attribute *attr, const char *valbuf, size_t count) +{ + struct usb_serial_port *port = to_usb_serial_port(dev); + struct edgeport_port *edge_port = usb_get_serial_port_data(port); + unsigned int v = simple_strtoul(valbuf, NULL, 0); + + dev_dbg(dev, "%s: setting uart_mode = %d\n", __func__, v); + + if (v < 256) + edge_port->bUartMode = v; + else + dev_err(dev, "%s - uart_mode %d is invalid\n", __func__, v); + + return count; +} +static DEVICE_ATTR_RW(uart_mode); + +static int edge_create_sysfs_attrs(struct usb_serial_port *port) +{ + return device_create_file(&port->dev, &dev_attr_uart_mode); +} + +static int edge_remove_sysfs_attrs(struct usb_serial_port *port) +{ + device_remove_file(&port->dev, &dev_attr_uart_mode); + return 0; +} + +#ifdef CONFIG_PM +static int edge_suspend(struct usb_serial *serial, pm_message_t message) +{ + struct edgeport_serial *edge_serial = usb_get_serial_data(serial); + + cancel_delayed_work_sync(&edge_serial->heartbeat_work); + + return 0; +} + +static int edge_resume(struct usb_serial *serial) +{ + struct edgeport_serial *edge_serial = usb_get_serial_data(serial); + + edge_heartbeat_schedule(edge_serial); + + return 0; +} +#endif + +static struct usb_serial_driver edgeport_1port_device = { + .driver = { + .owner = THIS_MODULE, + .name = "edgeport_ti_1", + }, + .description = "Edgeport TI 1 port adapter", + .id_table = edgeport_1port_id_table, + .num_ports = 1, + .num_bulk_out = 1, + .open = edge_open, + .close = edge_close, + .throttle = edge_throttle, + .unthrottle = edge_unthrottle, + .attach = edge_startup, + .calc_num_ports = edge_calc_num_ports, + .disconnect = edge_disconnect, + .release = edge_release, + .port_probe = edge_port_probe, + .port_remove = edge_port_remove, + .get_serial = get_serial_info, + .set_termios = edge_set_termios, + .tiocmget = edge_tiocmget, + .tiocmset = edge_tiocmset, + .tiocmiwait = usb_serial_generic_tiocmiwait, + .get_icount = usb_serial_generic_get_icount, + .write = edge_write, + .write_room = edge_write_room, + .chars_in_buffer = edge_chars_in_buffer, + .tx_empty = edge_tx_empty, + .break_ctl = edge_break, + .read_int_callback = edge_interrupt_callback, + .read_bulk_callback = edge_bulk_in_callback, + .write_bulk_callback = edge_bulk_out_callback, +#ifdef CONFIG_PM + .suspend = edge_suspend, + .resume = edge_resume, +#endif +}; + +static struct usb_serial_driver edgeport_2port_device = { + .driver = { + .owner = THIS_MODULE, + .name = "edgeport_ti_2", + }, + .description = "Edgeport TI 2 port adapter", + .id_table = edgeport_2port_id_table, + .num_ports = 2, + .num_bulk_out = 1, + .open = edge_open, + .close = edge_close, + .throttle = edge_throttle, + .unthrottle = edge_unthrottle, + .attach = edge_startup, + .calc_num_ports = edge_calc_num_ports, + .disconnect = edge_disconnect, + .release = edge_release, + .port_probe = edge_port_probe, + .port_remove = edge_port_remove, + .get_serial = get_serial_info, + .set_termios = edge_set_termios, + .tiocmget = edge_tiocmget, + .tiocmset = edge_tiocmset, + .tiocmiwait = usb_serial_generic_tiocmiwait, + .get_icount = usb_serial_generic_get_icount, + .write = edge_write, + .write_room = edge_write_room, + .chars_in_buffer = edge_chars_in_buffer, + .tx_empty = edge_tx_empty, + .break_ctl = edge_break, + .read_int_callback = edge_interrupt_callback, + .read_bulk_callback = edge_bulk_in_callback, + .write_bulk_callback = edge_bulk_out_callback, +#ifdef CONFIG_PM + .suspend = edge_suspend, + .resume = edge_resume, +#endif +}; + +static struct usb_serial_driver * const serial_drivers[] = { + &edgeport_1port_device, &edgeport_2port_device, NULL +}; + +module_usb_serial_driver(serial_drivers, id_table_combined); + +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); +MODULE_FIRMWARE("edgeport/down3.bin"); + +module_param(closing_wait, int, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain, in .01 secs"); + +module_param(ignore_cpu_rev, bool, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(ignore_cpu_rev, + "Ignore the cpu revision when connecting to a device"); + +module_param(default_uart_mode, int, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ..."); |