Fariya Fatima | dad0d04 | 2014-03-16 03:47:02 +0530 | [diff] [blame] | 1 | /** |
| 2 | * Copyright (c) 2014 Redpine Signals Inc. |
| 3 | * |
| 4 | * Permission to use, copy, modify, and/or distribute this software for any |
| 5 | * purpose with or without fee is hereby granted, provided that the above |
| 6 | * copyright notice and this permission notice appear in all copies. |
| 7 | * |
| 8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| 11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| 14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 15 | * |
| 16 | */ |
| 17 | |
| 18 | #include <linux/firmware.h> |
| 19 | #include "rsi_usb.h" |
| 20 | |
| 21 | /** |
| 22 | * rsi_copy_to_card() - This function includes the actual funtionality of |
| 23 | * copying the TA firmware to the card.Basically this |
| 24 | * function includes opening the TA file,reading the TA |
| 25 | * file and writing their values in blocks of data. |
| 26 | * @common: Pointer to the driver private structure. |
| 27 | * @fw: Pointer to the firmware value to be written. |
| 28 | * @len: length of firmware file. |
| 29 | * @num_blocks: Number of blocks to be written to the card. |
| 30 | * |
| 31 | * Return: 0 on success and -1 on failure. |
| 32 | */ |
| 33 | static int rsi_copy_to_card(struct rsi_common *common, |
| 34 | const u8 *fw, |
| 35 | u32 len, |
| 36 | u32 num_blocks) |
| 37 | { |
| 38 | struct rsi_hw *adapter = common->priv; |
| 39 | struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev; |
| 40 | u32 indx, ii; |
| 41 | u32 block_size = dev->tx_blk_size; |
| 42 | u32 lsb_address; |
| 43 | u32 base_address; |
| 44 | |
| 45 | base_address = TA_LOAD_ADDRESS; |
| 46 | |
| 47 | for (indx = 0, ii = 0; ii < num_blocks; ii++, indx += block_size) { |
| 48 | lsb_address = base_address; |
| 49 | if (rsi_usb_write_register_multiple(adapter, |
| 50 | lsb_address, |
| 51 | (u8 *)(fw + indx), |
| 52 | block_size)) { |
| 53 | rsi_dbg(ERR_ZONE, |
| 54 | "%s: Unable to load %s blk\n", __func__, |
| 55 | FIRMWARE_RSI9113); |
| 56 | return -EIO; |
| 57 | } |
| 58 | rsi_dbg(INIT_ZONE, "%s: loading block: %d\n", __func__, ii); |
| 59 | base_address += block_size; |
| 60 | } |
| 61 | |
| 62 | if (len % block_size) { |
| 63 | lsb_address = base_address; |
| 64 | if (rsi_usb_write_register_multiple(adapter, |
| 65 | lsb_address, |
| 66 | (u8 *)(fw + indx), |
| 67 | len % block_size)) { |
| 68 | rsi_dbg(ERR_ZONE, |
| 69 | "%s: Unable to load %s blk\n", __func__, |
| 70 | FIRMWARE_RSI9113); |
| 71 | return -EIO; |
| 72 | } |
| 73 | } |
| 74 | rsi_dbg(INIT_ZONE, |
| 75 | "%s: Succesfully loaded %s instructions\n", __func__, |
| 76 | FIRMWARE_RSI9113); |
| 77 | |
| 78 | rsi_dbg(INIT_ZONE, "%s: loaded firmware\n", __func__); |
| 79 | return 0; |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * rsi_usb_rx_thread() - This is a kernel thread to receive the packets from |
| 84 | * the USB device. |
| 85 | * @common: Pointer to the driver private structure. |
| 86 | * |
| 87 | * Return: None. |
| 88 | */ |
| 89 | void rsi_usb_rx_thread(struct rsi_common *common) |
| 90 | { |
| 91 | struct rsi_hw *adapter = common->priv; |
| 92 | struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev; |
| 93 | int status; |
| 94 | |
| 95 | do { |
| 96 | rsi_wait_event(&dev->rx_thread.event, EVENT_WAIT_FOREVER); |
| 97 | |
| 98 | if (atomic_read(&dev->rx_thread.thread_done)) |
| 99 | goto out; |
| 100 | |
| 101 | mutex_lock(&common->tx_rxlock); |
| 102 | status = rsi_read_pkt(common, 0); |
| 103 | if (status) { |
| 104 | rsi_dbg(ERR_ZONE, "%s: Failed To read data", __func__); |
| 105 | mutex_unlock(&common->tx_rxlock); |
| 106 | return; |
| 107 | } |
| 108 | mutex_unlock(&common->tx_rxlock); |
| 109 | rsi_reset_event(&dev->rx_thread.event); |
| 110 | if (adapter->rx_urb_submit(adapter)) { |
| 111 | rsi_dbg(ERR_ZONE, |
| 112 | "%s: Failed in urb submission", __func__); |
| 113 | return; |
| 114 | } |
| 115 | } while (1); |
| 116 | |
| 117 | out: |
| 118 | rsi_dbg(INFO_ZONE, "%s: Terminated thread\n", __func__); |
| 119 | complete_and_exit(&dev->rx_thread.completion, 0); |
| 120 | } |
| 121 | |
| 122 | |
| 123 | /** |
| 124 | * rsi_load_ta_instructions() - This function includes the actual funtionality |
| 125 | * of loading the TA firmware.This function also |
| 126 | * includes opening the TA file,reading the TA |
| 127 | * file and writing their value in blocks of data. |
| 128 | * @common: Pointer to the driver private structure. |
| 129 | * |
| 130 | * Return: status: 0 on success, -1 on failure. |
| 131 | */ |
| 132 | static int rsi_load_ta_instructions(struct rsi_common *common) |
| 133 | { |
| 134 | struct rsi_hw *adapter = common->priv; |
| 135 | struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev; |
| 136 | const struct firmware *fw_entry = NULL; |
| 137 | u32 block_size = dev->tx_blk_size; |
| 138 | const u8 *fw; |
| 139 | u32 num_blocks, len; |
| 140 | int status = 0; |
| 141 | |
| 142 | status = request_firmware(&fw_entry, FIRMWARE_RSI9113, adapter->device); |
| 143 | if (status < 0) { |
| 144 | rsi_dbg(ERR_ZONE, "%s Firmware file %s not found\n", |
| 145 | __func__, FIRMWARE_RSI9113); |
| 146 | return status; |
| 147 | } |
| 148 | |
| 149 | fw = kmemdup(fw_entry->data, fw_entry->size, GFP_KERNEL); |
| 150 | len = fw_entry->size; |
| 151 | |
| 152 | if (len % 4) |
| 153 | len += (4 - (len % 4)); |
| 154 | |
| 155 | num_blocks = (len / block_size); |
| 156 | |
| 157 | rsi_dbg(INIT_ZONE, "%s: Instruction size:%d\n", __func__, len); |
| 158 | rsi_dbg(INIT_ZONE, "%s: num blocks: %d\n", __func__, num_blocks); |
| 159 | |
| 160 | status = rsi_copy_to_card(common, fw, len, num_blocks); |
| 161 | release_firmware(fw_entry); |
| 162 | return status; |
| 163 | } |
| 164 | |
| 165 | /** |
| 166 | * rsi_device_init() - This Function Initializes The HAL. |
| 167 | * @common: Pointer to the driver private structure. |
| 168 | * |
| 169 | * Return: 0 on success, -1 on failure. |
| 170 | */ |
| 171 | int rsi_usb_device_init(struct rsi_common *common) |
| 172 | { |
| 173 | if (rsi_load_ta_instructions(common)) |
| 174 | return -EIO; |
| 175 | |
| 176 | return 0; |
| 177 | } |