182 lines
5.1 KiB
C
182 lines
5.1 KiB
C
/**
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* Copyright (c) 2014 Redpine Signals Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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#include <linux/firmware.h>
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#include "rsi_usb.h"
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/**
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* rsi_copy_to_card() - This function includes the actual funtionality of
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* copying the TA firmware to the card.Basically this
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* function includes opening the TA file,reading the TA
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* file and writing their values in blocks of data.
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* @common: Pointer to the driver private structure.
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* @fw: Pointer to the firmware value to be written.
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* @len: length of firmware file.
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* @num_blocks: Number of blocks to be written to the card.
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*
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* Return: 0 on success and -1 on failure.
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*/
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static int rsi_copy_to_card(struct rsi_common *common,
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const u8 *fw,
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u32 len,
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u32 num_blocks)
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{
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struct rsi_hw *adapter = common->priv;
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struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
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u32 indx, ii;
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u32 block_size = dev->tx_blk_size;
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u32 lsb_address;
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u32 base_address;
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base_address = TA_LOAD_ADDRESS;
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for (indx = 0, ii = 0; ii < num_blocks; ii++, indx += block_size) {
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lsb_address = base_address;
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if (rsi_usb_write_register_multiple(adapter,
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lsb_address,
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(u8 *)(fw + indx),
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block_size)) {
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rsi_dbg(ERR_ZONE,
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"%s: Unable to load %s blk\n", __func__,
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FIRMWARE_RSI9113);
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return -EIO;
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}
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rsi_dbg(INIT_ZONE, "%s: loading block: %d\n", __func__, ii);
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base_address += block_size;
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}
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if (len % block_size) {
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lsb_address = base_address;
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if (rsi_usb_write_register_multiple(adapter,
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lsb_address,
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(u8 *)(fw + indx),
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len % block_size)) {
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rsi_dbg(ERR_ZONE,
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"%s: Unable to load %s blk\n", __func__,
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FIRMWARE_RSI9113);
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return -EIO;
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}
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}
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rsi_dbg(INIT_ZONE,
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"%s: Succesfully loaded %s instructions\n", __func__,
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FIRMWARE_RSI9113);
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rsi_dbg(INIT_ZONE, "%s: loaded firmware\n", __func__);
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return 0;
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}
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/**
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* rsi_usb_rx_thread() - This is a kernel thread to receive the packets from
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* the USB device.
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* @common: Pointer to the driver private structure.
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*
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* Return: None.
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*/
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void rsi_usb_rx_thread(struct rsi_common *common)
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{
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struct rsi_hw *adapter = common->priv;
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struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
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int status;
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do {
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rsi_wait_event(&dev->rx_thread.event, EVENT_WAIT_FOREVER);
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if (atomic_read(&dev->rx_thread.thread_done))
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goto out;
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mutex_lock(&common->tx_rxlock);
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status = rsi_read_pkt(common, 0);
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if (status) {
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rsi_dbg(ERR_ZONE, "%s: Failed To read data", __func__);
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mutex_unlock(&common->tx_rxlock);
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return;
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}
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mutex_unlock(&common->tx_rxlock);
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rsi_reset_event(&dev->rx_thread.event);
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if (adapter->rx_urb_submit(adapter)) {
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rsi_dbg(ERR_ZONE,
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"%s: Failed in urb submission", __func__);
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return;
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}
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} while (1);
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out:
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rsi_dbg(INFO_ZONE, "%s: Terminated thread\n", __func__);
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complete_and_exit(&dev->rx_thread.completion, 0);
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}
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/**
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* rsi_load_ta_instructions() - This function includes the actual funtionality
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* of loading the TA firmware.This function also
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* includes opening the TA file,reading the TA
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* file and writing their value in blocks of data.
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* @common: Pointer to the driver private structure.
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*
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* Return: status: 0 on success, -1 on failure.
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*/
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static int rsi_load_ta_instructions(struct rsi_common *common)
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{
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struct rsi_hw *adapter = common->priv;
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struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
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const struct firmware *fw_entry = NULL;
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u32 block_size = dev->tx_blk_size;
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const u8 *fw;
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u32 num_blocks, len;
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int status = 0;
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status = request_firmware(&fw_entry, FIRMWARE_RSI9113, adapter->device);
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if (status < 0) {
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rsi_dbg(ERR_ZONE, "%s Firmware file %s not found\n",
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__func__, FIRMWARE_RSI9113);
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return status;
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}
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/* Copy firmware into DMA-accessible memory */
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fw = kmemdup(fw_entry->data, fw_entry->size, GFP_KERNEL);
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if (!fw)
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return -ENOMEM;
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len = fw_entry->size;
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if (len % 4)
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len += (4 - (len % 4));
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num_blocks = (len / block_size);
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rsi_dbg(INIT_ZONE, "%s: Instruction size:%d\n", __func__, len);
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rsi_dbg(INIT_ZONE, "%s: num blocks: %d\n", __func__, num_blocks);
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status = rsi_copy_to_card(common, fw, len, num_blocks);
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kfree(fw);
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release_firmware(fw_entry);
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return status;
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}
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/**
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* rsi_device_init() - This Function Initializes The HAL.
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* @common: Pointer to the driver private structure.
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*
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* Return: 0 on success, -1 on failure.
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*/
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int rsi_usb_device_init(struct rsi_common *common)
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{
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if (rsi_load_ta_instructions(common))
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return -EIO;
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return 0;
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}
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