diff options
Diffstat (limited to 'drivers/net/wireless/mwifiex/sdio.c')
| -rw-r--r-- | drivers/net/wireless/mwifiex/sdio.c | 1754 |
1 files changed, 1754 insertions, 0 deletions
diff --git a/drivers/net/wireless/mwifiex/sdio.c b/drivers/net/wireless/mwifiex/sdio.c new file mode 100644 index 000000000000..d425dbd91d19 --- /dev/null +++ b/drivers/net/wireless/mwifiex/sdio.c @@ -0,0 +1,1754 @@ +/* + * Marvell Wireless LAN device driver: SDIO specific handling + * + * Copyright (C) 2011, Marvell International Ltd. + * + * This software file (the "File") is distributed by Marvell International + * Ltd. under the terms of the GNU General Public License Version 2, June 1991 + * (the "License"). You may use, redistribute and/or modify this File in + * accordance with the terms and conditions of the License, a copy of which + * is available by writing to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the + * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt. + * + * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE + * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE + * ARE EXPRESSLY DISCLAIMED. The License provides additional details about + * this warranty disclaimer. + */ + +#include <linux/firmware.h> + +#include "decl.h" +#include "ioctl.h" +#include "util.h" +#include "fw.h" +#include "main.h" +#include "wmm.h" +#include "11n.h" +#include "sdio.h" + + +#define SDIO_VERSION "1.0" + +static struct mwifiex_if_ops sdio_ops; + +static struct semaphore add_remove_card_sem; + +/* + * SDIO probe. + * + * This function probes an mwifiex device and registers it. It allocates + * the card structure, enables SDIO function number and initiates the + * device registration and initialization procedure by adding a logical + * interface. + */ +static int +mwifiex_sdio_probe(struct sdio_func *func, const struct sdio_device_id *id) +{ + int ret; + struct sdio_mmc_card *card = NULL; + + pr_debug("info: vendor=0x%4.04X device=0x%4.04X class=%d function=%d\n", + func->vendor, func->device, func->class, func->num); + + card = kzalloc(sizeof(struct sdio_mmc_card), GFP_KERNEL); + if (!card) { + pr_err("%s: failed to alloc memory\n", __func__); + return -ENOMEM; + } + + card->func = func; + + func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE; + + sdio_claim_host(func); + ret = sdio_enable_func(func); + sdio_release_host(func); + + if (ret) { + pr_err("%s: failed to enable function\n", __func__); + kfree(card); + return -EIO; + } + + if (mwifiex_add_card(card, &add_remove_card_sem, &sdio_ops)) { + pr_err("%s: add card failed\n", __func__); + kfree(card); + sdio_claim_host(func); + ret = sdio_disable_func(func); + sdio_release_host(func); + ret = -1; + } + + return ret; +} + +/* + * SDIO remove. + * + * This function removes the interface and frees up the card structure. + */ +static void +mwifiex_sdio_remove(struct sdio_func *func) +{ + struct sdio_mmc_card *card; + + pr_debug("info: SDIO func num=%d\n", func->num); + + if (func) { + card = sdio_get_drvdata(func); + if (card) { + mwifiex_remove_card(card->adapter, + &add_remove_card_sem); + kfree(card); + } + } +} + +/* + * SDIO suspend. + * + * Kernel needs to suspend all functions separately. Therefore all + * registered functions must have drivers with suspend and resume + * methods. Failing that the kernel simply removes the whole card. + * + * If already not suspended, this function allocates and sends a host + * sleep activate request to the firmware and turns off the traffic. + */ +static int mwifiex_sdio_suspend(struct device *dev) +{ + struct sdio_func *func = dev_to_sdio_func(dev); + struct sdio_mmc_card *card; + struct mwifiex_adapter *adapter; + mmc_pm_flag_t pm_flag = 0; + int hs_actived = 0; + int i; + int ret = 0; + + if (func) { + pm_flag = sdio_get_host_pm_caps(func); + pr_debug("cmd: %s: suspend: PM flag = 0x%x\n", + sdio_func_id(func), pm_flag); + if (!(pm_flag & MMC_PM_KEEP_POWER)) { + pr_err("%s: cannot remain alive while host is" + " suspended\n", sdio_func_id(func)); + return -ENOSYS; + } + + card = sdio_get_drvdata(func); + if (!card || !card->adapter) { + pr_err("suspend: invalid card or adapter\n"); + return 0; + } + } else { + pr_err("suspend: sdio_func is not specified\n"); + return 0; + } + + adapter = card->adapter; + + /* Enable the Host Sleep */ + hs_actived = mwifiex_enable_hs(adapter); + if (hs_actived) { + pr_debug("cmd: suspend with MMC_PM_KEEP_POWER\n"); + ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER); + } + + /* Indicate device suspended */ + adapter->is_suspended = true; + + for (i = 0; i < adapter->priv_num; i++) + netif_carrier_off(adapter->priv[i]->netdev); + + return ret; +} + +/* + * SDIO resume. + * + * Kernel needs to suspend all functions separately. Therefore all + * registered functions must have drivers with suspend and resume + * methods. Failing that the kernel simply removes the whole card. + * + * If already not resumed, this function turns on the traffic and + * sends a host sleep cancel request to the firmware. + */ +static int mwifiex_sdio_resume(struct device *dev) +{ + struct sdio_func *func = dev_to_sdio_func(dev); + struct sdio_mmc_card *card; + struct mwifiex_adapter *adapter; + mmc_pm_flag_t pm_flag = 0; + int i; + + if (func) { + pm_flag = sdio_get_host_pm_caps(func); + card = sdio_get_drvdata(func); + if (!card || !card->adapter) { + pr_err("resume: invalid card or adapter\n"); + return 0; + } + } else { + pr_err("resume: sdio_func is not specified\n"); + return 0; + } + + adapter = card->adapter; + + if (!adapter->is_suspended) { + dev_warn(adapter->dev, "device already resumed\n"); + return 0; + } + + adapter->is_suspended = false; + + for (i = 0; i < adapter->priv_num; i++) + if (adapter->priv[i]->media_connected) + netif_carrier_on(adapter->priv[i]->netdev); + + /* Disable Host Sleep */ + mwifiex_cancel_hs(mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA), + MWIFIEX_ASYNC_CMD); + + return 0; +} + +/* Device ID for SD8787 */ +#define SDIO_DEVICE_ID_MARVELL_8787 (0x9119) + +/* WLAN IDs */ +static const struct sdio_device_id mwifiex_ids[] = { + {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8787)}, + {}, +}; + +MODULE_DEVICE_TABLE(sdio, mwifiex_ids); + +static const struct dev_pm_ops mwifiex_sdio_pm_ops = { + .suspend = mwifiex_sdio_suspend, + .resume = mwifiex_sdio_resume, +}; + +static struct sdio_driver mwifiex_sdio = { + .name = "mwifiex_sdio", + .id_table = mwifiex_ids, + .probe = mwifiex_sdio_probe, + .remove = mwifiex_sdio_remove, + .drv = { + .owner = THIS_MODULE, + .pm = &mwifiex_sdio_pm_ops, + } +}; + +/* + * This function writes data into SDIO card register. + */ +static int +mwifiex_write_reg(struct mwifiex_adapter *adapter, u32 reg, u32 data) +{ + struct sdio_mmc_card *card = adapter->card; + int ret = -1; + + sdio_claim_host(card->func); + sdio_writeb(card->func, (u8) data, reg, &ret); + sdio_release_host(card->func); + + return ret; +} + +/* + * This function reads data from SDIO card register. + */ +static int +mwifiex_read_reg(struct mwifiex_adapter *adapter, u32 reg, u32 *data) +{ + struct sdio_mmc_card *card = adapter->card; + int ret = -1; + u8 val; + + sdio_claim_host(card->func); + val = sdio_readb(card->func, reg, &ret); + sdio_release_host(card->func); + + *data = val; + + return ret; +} + +/* + * This function writes multiple data into SDIO card memory. + * + * This does not work in suspended mode. + */ +static int +mwifiex_write_data_sync(struct mwifiex_adapter *adapter, + u8 *buffer, u32 pkt_len, u32 port) +{ + struct sdio_mmc_card *card = adapter->card; + int ret = -1; + u8 blk_mode = + (port & MWIFIEX_SDIO_BYTE_MODE_MASK) ? BYTE_MODE : BLOCK_MODE; + u32 blk_size = (blk_mode == BLOCK_MODE) ? MWIFIEX_SDIO_BLOCK_SIZE : 1; + u32 blk_cnt = + (blk_mode == + BLOCK_MODE) ? (pkt_len / + MWIFIEX_SDIO_BLOCK_SIZE) : pkt_len; + u32 ioport = (port & MWIFIEX_SDIO_IO_PORT_MASK); + + if (adapter->is_suspended) { + dev_err(adapter->dev, + "%s: not allowed while suspended\n", __func__); + return -1; + } + + sdio_claim_host(card->func); + + if (!sdio_writesb(card->func, ioport, buffer, blk_cnt * blk_size)) + ret = 0; + + sdio_release_host(card->func); + + return ret; +} + +/* + * This function reads multiple data from SDIO card memory. + */ +static int mwifiex_read_data_sync(struct mwifiex_adapter *adapter, u8 *buffer, + u32 len, u32 port, u8 claim) +{ + struct sdio_mmc_card *card = adapter->card; + int ret = -1; + u8 blk_mode = + (port & MWIFIEX_SDIO_BYTE_MODE_MASK) ? BYTE_MODE : BLOCK_MODE; + u32 blk_size = (blk_mode == BLOCK_MODE) ? MWIFIEX_SDIO_BLOCK_SIZE : 1; + u32 blk_cnt = + (blk_mode == + BLOCK_MODE) ? (len / MWIFIEX_SDIO_BLOCK_SIZE) : len; + u32 ioport = (port & MWIFIEX_SDIO_IO_PORT_MASK); + + if (claim) + sdio_claim_host(card->func); + + if (!sdio_readsb(card->func, buffer, ioport, blk_cnt * blk_size)) + ret = 0; + + if (claim) + sdio_release_host(card->func); + + return ret; +} + +/* + * This function wakes up the card. + * + * A host power up command is written to the card configuration + * register to wake up the card. + */ +static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter) +{ + dev_dbg(adapter->dev, "event: wakeup device...\n"); + + return mwifiex_write_reg(adapter, CONFIGURATION_REG, HOST_POWER_UP); +} + +/* + * This function is called after the card has woken up. + * + * The card configuration register is reset. + */ +static int mwifiex_pm_wakeup_card_complete(struct mwifiex_adapter *adapter) +{ + dev_dbg(adapter->dev, "cmd: wakeup device completed\n"); + + return mwifiex_write_reg(adapter, CONFIGURATION_REG, 0); +} + +/* + * This function initializes the IO ports. + * + * The following operations are performed - + * - Read the IO ports (0, 1 and 2) + * - Set host interrupt Reset-To-Read to clear + * - Set auto re-enable interrupt + */ +static int mwifiex_init_sdio_ioport(struct mwifiex_adapter *adapter) +{ + u32 reg; + + adapter->ioport = 0; + + /* Read the IO port */ + if (!mwifiex_read_reg(adapter, IO_PORT_0_REG, ®)) + adapter->ioport |= (reg & 0xff); + else + return -1; + + if (!mwifiex_read_reg(adapter, IO_PORT_1_REG, ®)) + adapter->ioport |= ((reg & 0xff) << 8); + else + return -1; + + if (!mwifiex_read_reg(adapter, IO_PORT_2_REG, ®)) + adapter->ioport |= ((reg & 0xff) << 16); + else + return -1; + + pr_debug("info: SDIO FUNC1 IO port: %#x\n", adapter->ioport); + + /* Set Host interrupt reset to read to clear */ + if (!mwifiex_read_reg(adapter, HOST_INT_RSR_REG, ®)) + mwifiex_write_reg(adapter, HOST_INT_RSR_REG, + reg | SDIO_INT_MASK); + else + return -1; + + /* Dnld/Upld ready set to auto reset */ + if (!mwifiex_read_reg(adapter, CARD_MISC_CFG_REG, ®)) + mwifiex_write_reg(adapter, CARD_MISC_CFG_REG, + reg | AUTO_RE_ENABLE_INT); + else + return -1; + + return 0; +} + +/* + * This function sends data to the card. + */ +static int mwifiex_write_data_to_card(struct mwifiex_adapter *adapter, + u8 *payload, u32 pkt_len, u32 port) +{ + u32 i = 0; + int ret; + + do { + ret = mwifiex_write_data_sync(adapter, payload, pkt_len, port); + if (ret) { + i++; + dev_err(adapter->dev, "host_to_card, write iomem" + " (%d) failed: %d\n", i, ret); + if (mwifiex_write_reg(adapter, + CONFIGURATION_REG, 0x04)) + dev_err(adapter->dev, "write CFG reg failed\n"); + + ret = -1; + if (i > MAX_WRITE_IOMEM_RETRY) + return ret; + } + } while (ret == -1); + + return ret; +} + +/* + * This function gets the read port. + * + * If control port bit is set in MP read bitmap, the control port + * is returned, otherwise the current read port is returned and + * the value is increased (provided it does not reach the maximum + * limit, in which case it is reset to 1) + */ +static int mwifiex_get_rd_port(struct mwifiex_adapter *adapter, u8 *port) +{ + struct sdio_mmc_card *card = adapter->card; + u16 rd_bitmap = card->mp_rd_bitmap; + + dev_dbg(adapter->dev, "data: mp_rd_bitmap=0x%04x\n", rd_bitmap); + + if (!(rd_bitmap & (CTRL_PORT_MASK | DATA_PORT_MASK))) + return -1; + + if (card->mp_rd_bitmap & CTRL_PORT_MASK) { + card->mp_rd_bitmap &= (u16) (~CTRL_PORT_MASK); + *port = CTRL_PORT; + dev_dbg(adapter->dev, "data: port=%d mp_rd_bitmap=0x%04x\n", + *port, card->mp_rd_bitmap); + } else { + if (card->mp_rd_bitmap & (1 << card->curr_rd_port)) { + card->mp_rd_bitmap &= + (u16) (~(1 << card->curr_rd_port)); + *port = card->curr_rd_port; + + if (++card->curr_rd_port == MAX_PORT) + card->curr_rd_port = 1; + } else { + return -1; + } + + dev_dbg(adapter->dev, + "data: port=%d mp_rd_bitmap=0x%04x -> 0x%04x\n", + *port, rd_bitmap, card->mp_rd_bitmap); + } + return 0; +} + +/* + * This function gets the write port for data. + * + * The current write port is returned if available and the value is + * increased (provided it does not reach the maximum limit, in which + * case it is reset to 1) + */ +static int mwifiex_get_wr_port_data(struct mwifiex_adapter *adapter, u8 *port) +{ + struct sdio_mmc_card *card = adapter->card; + u16 wr_bitmap = card->mp_wr_bitmap; + + dev_dbg(adapter->dev, "data: mp_wr_bitmap=0x%04x\n", wr_bitmap); + + if (!(wr_bitmap & card->mp_data_port_mask)) + return -1; + + if (card->mp_wr_bitmap & (1 << card->curr_wr_port)) { + card->mp_wr_bitmap &= (u16) (~(1 << card->curr_wr_port)); + *port = card->curr_wr_port; + if (++card->curr_wr_port == card->mp_end_port) + card->curr_wr_port = 1; + } else { + adapter->data_sent = true; + return -EBUSY; + } + + if (*port == CTRL_PORT) { + dev_err(adapter->dev, "invalid data port=%d cur port=%d" + " mp_wr_bitmap=0x%04x -> 0x%04x\n", + *port, card->curr_wr_port, wr_bitmap, + card->mp_wr_bitmap); + return -1; + } + + dev_dbg(adapter->dev, "data: port=%d mp_wr_bitmap=0x%04x -> 0x%04x\n", + *port, wr_bitmap, card->mp_wr_bitmap); + + return 0; +} + +/* + * This function polls the card status. + */ +static int +mwifiex_sdio_poll_card_status(struct mwifiex_adapter *adapter, u8 bits) +{ + u32 tries; + u32 cs; + + for (tries = 0; tries < MAX_POLL_TRIES; tries++) { + if (mwifiex_read_reg(adapter, CARD_STATUS_REG, &cs)) + break; + else if ((cs & bits) == bits) + return 0; + + udelay(10); + } + + dev_err(adapter->dev, "poll card status failed, tries = %d\n", + tries); + return -1; +} + +/* + * This function reads the firmware status. + */ +static int +mwifiex_sdio_read_fw_status(struct mwifiex_adapter *adapter, u16 *dat) +{ + u32 fws0, fws1; + + if (mwifiex_read_reg(adapter, CARD_FW_STATUS0_REG, &fws0)) + return -1; + + if (mwifiex_read_reg(adapter, CARD_FW_STATUS1_REG, &fws1)) + return -1; + + *dat = (u16) ((fws1 << 8) | fws0); + + return 0; +} + +/* + * This function disables the host interrupt. + * + * The host interrupt mask is read, the disable bit is reset and + * written back to the card host interrupt mask register. + */ +static int mwifiex_sdio_disable_host_int(struct mwifiex_adapter *adapter) +{ + u32 host_int_mask; + + /* Read back the host_int_mask register */ + if (mwifiex_read_reg(adapter, HOST_INT_MASK_REG, &host_int_mask)) + return -1; + + /* Update with the mask and write back to the register */ + host_int_mask &= ~HOST_INT_DISABLE; + + if (mwifiex_write_reg(adapter, HOST_INT_MASK_REG, host_int_mask)) { + dev_err(adapter->dev, "disable host interrupt failed\n"); + return -1; + } + + return 0; +} + +/* + * This function enables the host interrupt. + * + * The host interrupt enable mask is written to the card + * host interrupt mask register. + */ +static int mwifiex_sdio_enable_host_int(struct mwifiex_adapter *adapter) +{ + /* Simply write the mask to the register */ + if (mwifiex_write_reg(adapter, HOST_INT_MASK_REG, HOST_INT_ENABLE)) { + dev_err(adapter->dev, "enable host interrupt failed\n"); + return -1; + } + return 0; +} + +/* + * This function sends a data buffer to the card. + */ +static int mwifiex_sdio_card_to_host(struct mwifiex_adapter *adapter, + u32 *type, u8 *buffer, + u32 npayload, u32 ioport) +{ + int ret; + u32 nb; + + if (!buffer) { + dev_err(adapter->dev, "%s: buffer is NULL\n", __func__); + return -1; + } + + ret = mwifiex_read_data_sync(adapter, buffer, npayload, ioport, 1); + + if (ret) { + dev_err(adapter->dev, "%s: read iomem failed: %d\n", __func__, + ret); + return -1; + } + + nb = le16_to_cpu(*(__le16 *) (buffer)); + if (nb > npayload) { + dev_err(adapter->dev, "%s: invalid packet, nb=%d, npayload=%d\n", + __func__, nb, npayload); + return -1; + } + + *type = le16_to_cpu(*(__le16 *) (buffer + 2)); + + return ret; +} + +/* + * This function downloads the firmware to the card. + * + * Firmware is downloaded to the card in blocks. Every block download + * is tested for CRC errors, and retried a number of times before + * returning failure. + */ +static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter, + struct mwifiex_fw_image *fw) +{ + int ret; + u8 *firmware = fw->fw_buf; + u32 firmware_len = fw->fw_len; + u32 offset = 0; + u32 base0, base1; + u8 *fwbuf; + u16 len = 0; + u32 txlen, tx_blocks = 0, tries; + u32 i = 0; + + if (!firmware_len) { + dev_err(adapter->dev, "firmware image not found!" + " Terminating download\n"); + return -1; + } + + dev_dbg(adapter->dev, "info: downloading FW image (%d bytes)\n", + firmware_len); + + /* Assume that the allocated buffer is 8-byte aligned */ + fwbuf = kzalloc(MWIFIEX_UPLD_SIZE, GFP_KERNEL); + if (!fwbuf) { + dev_err(adapter->dev, "unable to alloc buffer for firmware." + " Terminating download\n"); + return -ENOMEM; + } + + /* Perform firmware data transfer */ + do { + /* The host polls for the DN_LD_CARD_RDY and CARD_IO_READY + bits */ + ret = mwifiex_sdio_poll_card_status(adapter, CARD_IO_READY | + DN_LD_CARD_RDY); + if (ret) { + dev_err(adapter->dev, "FW download with helper:" + " poll status timeout @ %d\n", offset); + goto done; + } + + /* More data? */ + if (offset >= firmware_len) + break; + + for (tries = 0; tries < MAX_POLL_TRIES; tries++) { + ret = mwifiex_read_reg(adapter, HOST_F1_RD_BASE_0, + &base0); + if (ret) { + dev_err(adapter->dev, "dev BASE0 register read" + " failed: base0=0x%04X(%d). Terminating " + "download\n", base0, base0); + goto done; + } + ret = mwifiex_read_reg(adapter, HOST_F1_RD_BASE_1, + &base1); + if (ret) { + dev_err(adapter->dev, "dev BASE1 register read" + " failed: base1=0x%04X(%d). Terminating " + "download\n", base1, base1); + goto done; + } + len = (u16) (((base1 & 0xff) << 8) | (base0 & 0xff)); + + if (len) + break; + + udelay(10); + } + + if (!len) { + break; + } else if (len > MWIFIEX_UPLD_SIZE) { + dev_err(adapter->dev, "FW download failed @ %d," + " invalid length %d\n", offset, len); + ret = -1; + goto done; + } + + txlen = len; + + if (len & BIT(0)) { + i++; + if (i > MAX_WRITE_IOMEM_RETRY) { + dev_err(adapter->dev, "FW download failed @" + " %d, over max retry count\n", offset); + ret = -1; + goto done; + } + dev_err(adapter->dev, "CRC indicated by the helper:" + " len = 0x%04X, txlen = %d\n", len, txlen); + len &= ~BIT(0); + /* Setting this to 0 to resend from same offset */ + txlen = 0; + } else { + i = 0; + + /* Set blocksize to transfer - checking for last + block */ + if (firmware_len - offset < txlen) + txlen = firmware_len - offset; + + tx_blocks = (txlen + MWIFIEX_SDIO_BLOCK_SIZE - + 1) / MWIFIEX_SDIO_BLOCK_SIZE; + + /* Copy payload to buffer */ + memmove(fwbuf, &firmware[offset], txlen); + } + + ret = mwifiex_write_data_sync(adapter, fwbuf, tx_blocks * + MWIFIEX_SDIO_BLOCK_SIZE, + adapter->ioport); + if (ret) { + dev_err(adapter->dev, "FW download, write iomem (%d)" + " failed @ %d\n", i, offset); + if (mwifiex_write_reg(adapter, CONFIGURATION_REG, 0x04)) + dev_err(adapter->dev, "write CFG reg failed\n"); + + ret = -1; + goto done; + } + + offset += txlen; + } while (true); + + dev_dbg(adapter->dev, "info: FW download over, size %d bytes\n", + offset); + + ret = 0; +done: + kfree(fwbuf); + return ret; +} + +/* + * This function checks the firmware status in card. + * + * The winner interface is also determined by this function. + */ +static int mwifiex_check_fw_status(struct mwifiex_adapter *adapter, + u32 poll_num, int *winner) +{ + int ret = 0; + u16 firmware_stat; + u32 tries; + u32 winner_status; + + /* Wait for firmware initialization event */ + for (tries = 0; tries < poll_num; tries++) { + ret = mwifiex_sdio_read_fw_status(adapter, &firmware_stat); + if (ret) + continue; + if (firmware_stat == FIRMWARE_READY) { + ret = 0; + break; + } else { + mdelay(100); + ret = -1; + } + } + + if (winner && ret) { + if (mwifiex_read_reg + (adapter, CARD_FW_STATUS0_REG, &winner_status)) + winner_status = 0; + + if (winner_status) + *winner = 0; + else + *winner = 1; + } + return ret; +} + +/* + * This function reads the interrupt status from card. + */ +static void mwifiex_interrupt_status(struct mwifiex_adapter *adapter) +{ + struct sdio_mmc_card *card = adapter->card; + u32 sdio_ireg; + unsigned long flags; + + if (mwifiex_read_data_sync(adapter, card->mp_regs, MAX_MP_REGS, + REG_PORT | MWIFIEX_SDIO_BYTE_MODE_MASK, + 0)) { + dev_err(adapter->dev, "read mp_regs failed\n"); + return; + } + + sdio_ireg = card->mp_regs[HOST_INTSTATUS_REG]; + if (sdio_ireg) { + /* + * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS + * Clear the interrupt status register + */ + dev_dbg(adapter->dev, "int: sdio_ireg = %#x\n", sdio_ireg); + spin_lock_irqsave(&adapter->int_lock, flags); + adapter->int_status |= sdio_ireg; + spin_unlock_irqrestore(&adapter->int_lock, flags); + } +} + +/* + * SDIO interrupt handler. + * + * This function reads the interrupt status from firmware and assigns + * the main process in workqueue which will handle the interrupt. + */ +static void +mwifiex_sdio_interrupt(struct sdio_func *func) +{ + struct mwifiex_adapter *adapter; + struct sdio_mmc_card *card; + + card = sdio_get_drvdata(func); + if (!card || !card->adapter) { + pr_debug("int: func=%p card=%p adapter=%p\n", + func, card, card ? card->adapter : NULL); + return; + } + adapter = card->adapter; + + if (adapter->surprise_removed) + return; + + if (!adapter->pps_uapsd_mode && adapter->ps_state == PS_STATE_SLEEP) + adapter->ps_state = PS_STATE_AWAKE; + + mwifiex_interrupt_status(adapter); + queue_work(adapter->workqueue, &adapter->main_work); +} + +/* + * This function decodes a received packet. + * + * Based on the type, the packet is treated as either a data, or + * a command response, or an event, and the correct handler + * function is invoked. + */ +static int mwifiex_decode_rx_packet(struct mwifiex_adapter *adapter, + struct sk_buff *skb, u32 upld_typ) +{ + u8 *cmd_buf; + + skb_pull(skb, INTF_HEADER_LEN); + + switch (upld_typ) { + case MWIFIEX_TYPE_DATA: + dev_dbg(adapter->dev, "info: --- Rx: Data packet ---\n"); + mwifiex_handle_rx_packet(adapter, skb); + break; + + case MWIFIEX_TYPE_CMD: + dev_dbg(adapter->dev, "info: --- Rx: Cmd Response ---\n"); + /* take care of curr_cmd = NULL case */ + if (!adapter->curr_cmd) { + cmd_buf = adapter->upld_buf; + + if (adapter->ps_state == PS_STATE_SLEEP_CFM) + mwifiex_process_sleep_confirm_resp(adapter, + skb->data, skb->len); + + memcpy(cmd_buf, skb->data, min_t(u32, + MWIFIEX_SIZE_OF_CMD_BUFFER, skb->len)); + + dev_kfree_skb_any(skb); + } else { + adapter->cmd_resp_received = true; + adapter->curr_cmd->resp_skb = skb; + } + break; + + case MWIFIEX_TYPE_EVENT: + dev_dbg(adapter->dev, "info: --- Rx: Event ---\n"); + adapter->event_cause = *(u32 *) skb->data; + + skb_pull(skb, MWIFIEX_EVENT_HEADER_LEN); + + if ((skb->len > 0) && (skb->len < MAX_EVENT_SIZE)) + memcpy(adapter->event_body, skb->data, skb->len); + + /* event cause has been saved to adapter->event_cause */ + adapter->event_received = true; + adapter->event_skb = skb; + + break; + + default: + dev_err(adapter->dev, "unknown upload type %#x\n", upld_typ); + dev_kfree_skb_any(skb); + break; + } + + return 0; +} + +/* + * This function transfers received packets from card to driver, performing + * aggregation if required. + * + * For data received on control port, or if aggregation is disabled, the + * received buffers are uploaded as separate packets. However, if aggregation + * is enabled and required, the buffers are copied onto an aggregation buffer, + * provided there is space left, processed and finally uploaded. + */ +static int mwifiex_sdio_card_to_host_mp_aggr(struct mwifiex_adapter *adapter, + struct sk_buff *skb, u8 port) +{ + struct sdio_mmc_card *card = adapter->card; + s32 f_do_rx_aggr = 0; + s32 f_do_rx_cur = 0; + s32 f_aggr_cur = 0; + struct sk_buff *skb_deaggr; + u32 pind; + u32 pkt_len, pkt_type = 0; + u8 *curr_ptr; + u32 rx_len = skb->len; + + if (port == CTRL_PORT) { + /* Read the command Resp without aggr */ + dev_dbg(adapter->dev, "info: %s: no aggregation for cmd " + "response\n", __func__); + + f_do_rx_cur = 1; + goto rx_curr_single; + } + + if (!card->mpa_rx.enabled) { + dev_dbg(adapter->dev, "info: %s: rx aggregation disabled\n", + __func__); + + f_do_rx_cur = 1; + goto rx_curr_single; + } + + if (card->mp_rd_bitmap & (~((u16) CTRL_PORT_MASK))) { + /* Some more data RX pending */ + dev_dbg(adapter->dev, "info: %s: not last packet\n", __func__); + + if (MP_RX_AGGR_IN_PROGRESS(card)) { + if (MP_RX_AGGR_BUF_HAS_ROOM(card, skb->len)) { + f_aggr_cur = 1; + } else { + /* No room in Aggr buf, do rx aggr now */ + f_do_rx_aggr = 1; + f_do_rx_cur = 1; + } + } else { + /* Rx aggr not in progress */ + f_aggr_cur = 1; + } + + } else { + /* No more data RX pending */ + dev_dbg(adapter->dev, "info: %s: last packet\n", __func__); + + if (MP_RX_AGGR_IN_PROGRESS(card)) { + f_do_rx_aggr = 1; + if (MP_RX_AGGR_BUF_HAS_ROOM(card, skb->len)) + f_aggr_cur = 1; + else + /* No room in Aggr buf, do rx aggr now */ + f_do_rx_cur = 1; + } else { + f_do_rx_cur = 1; + } + } + + if (f_aggr_cur) { + dev_dbg(adapter->dev, "info: current packet aggregation\n"); + /* Curr pkt can be aggregated */ + MP_RX_AGGR_SETUP(card, skb, port); + + if (MP_RX_AGGR_PKT_LIMIT_REACHED(card) || + MP_RX_AGGR_PORT_LIMIT_REACHED(card)) { + dev_dbg(adapter->dev, "info: %s: aggregated packet " + "limit reached\n", __func__); + /* No more pkts allowed in Aggr buf, rx it */ + f_do_rx_aggr = 1; + } + } + + if (f_do_rx_aggr) { + /* do aggr RX now */ + dev_dbg(adapter->dev, "info: do_rx_aggr: num of packets: %d\n", + card->mpa_rx.pkt_cnt); + + if (mwifiex_read_data_sync(adapter, card->mpa_rx.buf, + card->mpa_rx.buf_len, + (adapter->ioport | 0x1000 | + (card->mpa_rx.ports << 4)) + + card->mpa_rx.start_port, 1)) + return -1; + + curr_ptr = card->mpa_rx.buf; + + for (pind = 0; pind < card->mpa_rx.pkt_cnt; pind++) { + + /* get curr PKT len & type */ + pkt_len = *(u16 *) &curr_ptr[0]; + pkt_type = *(u16 *) &curr_ptr[2]; + + /* copy pkt to deaggr buf */ + skb_deaggr = card->mpa_rx.skb_arr[pind]; + + if ((pkt_type == MWIFIEX_TYPE_DATA) && (pkt_len <= + card->mpa_rx.len_arr[pind])) { + + memcpy(skb_deaggr->data, curr_ptr, pkt_len); + + skb_trim(skb_deaggr, pkt_len); + + /* Process de-aggr packet */ + mwifiex_decode_rx_packet(adapter, skb_deaggr, + pkt_type); + } else { + dev_err(adapter->dev, "wrong aggr pkt:" + " type=%d len=%d max_len=%d\n", + pkt_type, pkt_len, + card->mpa_rx.len_arr[pind]); + dev_kfree_skb_any(skb_deaggr); + } + curr_ptr += card->mpa_rx.len_arr[pind]; + } + MP_RX_AGGR_BUF_RESET(card); + } + +rx_curr_single: + if (f_do_rx_cur) { + dev_dbg(adapter->dev, "info: RX: port: %d, rx_len: %d\n", + port, rx_len); + + if (mwifiex_sdio_card_to_host(adapter, &pkt_type, + skb->data, skb->len, + adapter->ioport + port)) + return -1; + + mwifiex_decode_rx_packet(adapter, skb, pkt_type); + } + + return 0; +} + +/* + * This function checks the current interrupt status. + * + * The following interrupts are checked and handled by this function - + * - Data sent + * - Command sent + * - Packets received + * + * Since the firmware does not generate download ready interrupt if the + * port updated is command port only, command sent interrupt checking + * should be done manually, and for every SDIO interrupt. + * + * In case of Rx packets received, the packets are uploaded from card to + * host and processed accordingly. + */ +static int mwifiex_process_int_status(struct mwifiex_adapter *adapter) +{ + struct sdio_mmc_card *card = adapter->card; + int ret = 0; + u8 sdio_ireg; + struct sk_buff *skb; + u8 port = CTRL_PORT; + u32 len_reg_l, len_reg_u; + u32 rx_blocks; + u16 rx_len; + unsigned long flags; + + spin_lock_irqsave(&adapter->int_lock, flags); + sdio_ireg = adapter->int_status; + adapter->int_status = 0; + spin_unlock_irqrestore(&adapter->int_lock, flags); + + if (!sdio_ireg) + return ret; + + if (sdio_ireg & DN_LD_HOST_INT_STATUS) { + card->mp_wr_bitmap = ((u16) card->mp_regs[WR_BITMAP_U]) << 8; + card->mp_wr_bitmap |= (u16) card->mp_regs[WR_BITMAP_L]; + dev_dbg(adapter->dev, "int: DNLD: wr_bitmap=0x%04x\n", + card->mp_wr_bitmap); + if (adapter->data_sent && + (card->mp_wr_bitmap & card->mp_data_port_mask)) { + dev_dbg(adapter->dev, + "info: <--- Tx DONE Interrupt --->\n"); + adapter->data_sent = false; + } + } + + /* As firmware will not generate download ready interrupt if the port + updated is command port only, cmd_sent should be done for any SDIO + interrupt. */ + if (adapter->cmd_sent) { + /* Check if firmware has attach buffer at command port and + update just that in wr_bit_map. */ + card->mp_wr_bitmap |= + (u16) card->mp_regs[WR_BITMAP_L] & CTRL_PORT_MASK; + if (card->mp_wr_bitmap & CTRL_PORT_MASK) + adapter->cmd_sent = false; + } + + dev_dbg(adapter->dev, "info: cmd_sent=%d data_sent=%d\n", + adapter->cmd_sent, adapter->data_sent); + if (sdio_ireg & UP_LD_HOST_INT_STATUS) { + card->mp_rd_bitmap = ((u16) card->mp_regs[RD_BITMAP_U]) << 8; + card->mp_rd_bitmap |= (u16) card->mp_regs[RD_BITMAP_L]; + dev_dbg(adapter->dev, "int: UPLD: rd_bitmap=0x%04x\n", + card->mp_rd_bitmap); + + while (true) { + ret = mwifiex_get_rd_port(adapter, &port); + if (ret) { + dev_dbg(adapter->dev, + "info: no more rd_port available\n"); + break; + } + len_reg_l = RD_LEN_P0_L + (port << 1); + len_reg_u = RD_LEN_P0_U + (port << 1); + rx_len = ((u16) card->mp_regs[len_reg_u]) << 8; + rx_len |= (u16) card->mp_regs[len_reg_l]; + dev_dbg(adapter->dev, "info: RX: port=%d rx_len=%u\n", + port, rx_len); + rx_blocks = + (rx_len + MWIFIEX_SDIO_BLOCK_SIZE - + 1) / MWIFIEX_SDIO_BLOCK_SIZE; + if (rx_len <= INTF_HEADER_LEN + || (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE) > + MWIFIEX_RX_DATA_BUF_SIZE) { + dev_err(adapter->dev, "invalid rx_len=%d\n", + rx_len); + return -1; + } + rx_len = (u16) (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE); + + skb = dev_alloc_skb(rx_len); + + if (!skb) { + dev_err(adapter->dev, "%s: failed to alloc skb", + __func__); + return -1; + } + + skb_put(skb, rx_len); + + dev_dbg(adapter->dev, "info: rx_len = %d skb->len = %d\n", + rx_len, skb->len); + + if (mwifiex_sdio_card_to_host_mp_aggr(adapter, skb, + port)) { + u32 cr = 0; + + dev_err(adapter->dev, "card_to_host_mpa failed:" + " int status=%#x\n", sdio_ireg); + if (mwifiex_read_reg(adapter, + CONFIGURATION_REG, &cr)) + dev_err(adapter->dev, + "read CFG reg failed\n"); + + dev_dbg(adapter->dev, + "info: CFG reg val = %d\n", cr); + if (mwifiex_write_reg(adapter, + CONFIGURATION_REG, + (cr | 0x04))) + dev_err(adapter->dev, + "write CFG reg failed\n"); + + dev_dbg(adapter->dev, "info: write success\n"); + if (mwifiex_read_reg(adapter, + CONFIGURATION_REG, &cr)) + dev_err(adapter->dev, + "read CFG reg failed\n"); + + dev_dbg(adapter->dev, + "info: CFG reg val =%x\n", cr); + dev_kfree_skb_any(skb); + return -1; + } + } + } + + return 0; +} + +/* + * This function aggregates transmission buffers in driver and downloads + * the aggregated packet to card. + * + * The individual packets are aggregated by copying into an aggregation + * buffer and then downloaded to the card. Previous unsent packets in the + * aggregation buffer are pre-copied first before new packets are added. + * Aggregation is done till there is space left in the aggregation buffer, + * or till new packets are available. + * + * The function will only download the packet to the card when aggregation + * stops, otherwise it will just aggregate the packet in aggregation buffer + * and return. + */ +static int mwifiex_host_to_card_mp_aggr(struct mwifiex_adapter *adapter, + u8 *payload, u32 pkt_len, u8 port, + u32 next_pkt_len) +{ + struct sdio_mmc_card *card = adapter->card; + int ret = 0; + s32 f_send_aggr_buf = 0; + s32 f_send_cur_buf = 0; + s32 f_precopy_cur_buf = 0; + s32 f_postcopy_cur_buf = 0; + + if ((!card->mpa_tx.enabled) || (port == CTRL_PORT)) { + dev_dbg(adapter->dev, "info: %s: tx aggregation disabled\n", + __func__); + + f_send_cur_buf = 1; + goto tx_curr_single; + } + + if (next_pkt_len) { + /* More pkt in TX queue */ + dev_dbg(adapter->dev, "info: %s: more packets in queue.\n", + __func__); + + if (MP_TX_AGGR_IN_PROGRESS(card)) { + if (!MP_TX_AGGR_PORT_LIMIT_REACHED(card) && + MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len)) { + f_precopy_cur_buf = 1; + + if (!(card->mp_wr_bitmap & + (1 << card->curr_wr_port)) + || !MP_TX_AGGR_BUF_HAS_ROOM( + card, next_pkt_len)) + f_send_aggr_buf = 1; + } else { + /* No room in Aggr buf, send it */ + f_send_aggr_buf = 1; + + if (MP_TX_AGGR_PORT_LIMIT_REACHED(card) || + !(card->mp_wr_bitmap & + (1 << card->curr_wr_port))) + f_send_cur_buf = 1; + else + f_postcopy_cur_buf = 1; + } + } else { + if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len) + && (card->mp_wr_bitmap & (1 << card->curr_wr_port))) + f_precopy_cur_buf = 1; + else + f_send_cur_buf = 1; + } + } else { + /* Last pkt in TX queue */ + dev_dbg(adapter->dev, "info: %s: Last packet in Tx Queue.\n", + __func__); + + if (MP_TX_AGGR_IN_PROGRESS(card)) { + /* some packs in Aggr buf already */ + f_send_aggr_buf = 1; + + if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len)) + f_precopy_cur_buf = 1; + else + /* No room in Aggr buf, send it */ + f_send_cur_buf = 1; + } else { + f_send_cur_buf = 1; + } + } + + if (f_precopy_cur_buf) { + dev_dbg(adapter->dev, "data: %s: precopy current buffer\n", + __func__); + MP_TX_AGGR_BUF_PUT(card, payload, pkt_len, port); + + if (MP_TX_AGGR_PKT_LIMIT_REACHED(card) || + MP_TX_AGGR_PORT_LIMIT_REACHED(card)) + /* No more pkts allowed in Aggr buf, send it */ + f_send_aggr_buf = 1; + } + + if (f_send_aggr_buf) { + dev_dbg(adapter->dev, "data: %s: send aggr buffer: %d %d\n", + __func__, + card->mpa_tx.start_port, card->mpa_tx.ports); + ret = mwifiex_write_data_to_card(adapter, card->mpa_tx.buf, + card->mpa_tx.buf_len, + (adapter->ioport | 0x1000 | + (card->mpa_tx.ports << 4)) + + card->mpa_tx.start_port); + + MP_TX_AGGR_BUF_RESET(card); + } + +tx_curr_single: + if (f_send_cur_buf) { + dev_dbg(adapter->dev, "data: %s: send current buffer %d\n", + __func__, port); + ret = mwifiex_write_data_to_card(adapter, payload, pkt_len, + adapter->ioport + port); + } + + if (f_postcopy_cur_buf) { + dev_dbg(adapter->dev, "data: %s: postcopy current buffer\n", + __func__); + MP_TX_AGGR_BUF_PUT(card, payload, pkt_len, port); + } + + return ret; +} + +/* + * This function downloads data from driver to card. + * + * Both commands and data packets are transferred to the card by this + * function. + * + * This function adds the SDIO specific header to the front of the buffer + * before transferring. The header contains the length of the packet and + * the type. The firmware handles the packets based upon this set type. + */ +static int mwifiex_sdio_host_to_card(struct mwifiex_adapter *adapter, + u8 type, u8 *payload, u32 pkt_len, + struct mwifiex_tx_param *tx_param) +{ + struct sdio_mmc_card *card = adapter->card; + int ret; + u32 buf_block_len; + u32 blk_size; + u8 port = CTRL_PORT; + + /* Allocate buffer and copy payload */ + blk_size = MWIFIEX_SDIO_BLOCK_SIZE; + buf_block_len = (pkt_len + blk_size - 1) / blk_size; + *(u16 *) &payload[0] = (u16) pkt_len; + *(u16 *) &payload[2] = type; + + /* + * This is SDIO specific header + * u16 length, + * u16 type (MWIFIEX_TYPE_DATA = 0, MWIFIEX_TYPE_CMD = 1, + * MWIFIEX_TYPE_EVENT = 3) + */ + if (type == MWIFIEX_TYPE_DATA) { + ret = mwifiex_get_wr_port_data(adapter, &port); + if (ret) { + dev_err(adapter->dev, "%s: no wr_port available\n", + __func__); + return ret; + } + } else { + adapter->cmd_sent = true; + /* Type must be MWIFIEX_TYPE_CMD */ + + if (pkt_len <= INTF_HEADER_LEN || + pkt_len > MWIFIEX_UPLD_SIZE) + dev_err(adapter->dev, "%s: payload=%p, nb=%d\n", + __func__, payload, pkt_len); + } + + /* Transfer data to card */ + pkt_len = buf_block_len * blk_size; + + if (tx_param) + ret = mwifiex_host_to_card_mp_aggr(adapter, payload, pkt_len, + port, tx_param->next_pkt_len); + else + ret = mwifiex_host_to_card_mp_aggr(adapter, payload, pkt_len, + port, 0); + + if (ret) { + if (type == MWIFIEX_TYPE_CMD) + adapter->cmd_sent = false; + if (type == MWIFIEX_TYPE_DATA) + adapter->data_sent = false; + } else { + if (type == MWIFIEX_TYPE_DATA) { + if (!(card->mp_wr_bitmap & (1 << card->curr_wr_port))) + adapter->data_sent = true; + else + adapter->data_sent = false; + } + } + + return ret; +} + +/* + * This function allocates the MPA Tx and Rx buffers. + */ +static int mwifiex_alloc_sdio_mpa_buffers(struct mwifiex_adapter *adapter, + u32 mpa_tx_buf_size, u32 mpa_rx_buf_size) +{ + struct sdio_mmc_card *card = adapter->card; + int ret = 0; + + card->mpa_tx.buf = kzalloc(mpa_tx_buf_size, GFP_KERNEL); + if (!card->mpa_tx.buf) { + dev_err(adapter->dev, "could not alloc buffer for MP-A TX\n"); + ret = -1; + goto error; + } + + card->mpa_tx.buf_size = mpa_tx_buf_size; + + card->mpa_rx.buf = kzalloc(mpa_rx_buf_size, GFP_KERNEL); + if (!card->mpa_rx.buf) { + dev_err(adapter->dev, "could not alloc buffer for MP-A RX\n"); + ret = -1; + goto error; + } + + card->mpa_rx.buf_size = mpa_rx_buf_size; + +error: + if (ret) { + kfree(card->mpa_tx.buf); + kfree(card->mpa_rx.buf); + } + + return ret; +} + +/* + * This function unregisters the SDIO device. + * + * The SDIO IRQ is released, the function is disabled and driver + * data is set to null. + */ +static void +mwifiex_unregister_dev(struct mwifiex_adapter *adapter) +{ + struct sdio_mmc_card *card = adapter->card; + + if (adapter->card) { + /* Release the SDIO IRQ */ + sdio_claim_host(card->func); + sdio_release_irq(card->func); + sdio_disable_func(card->func); + sdio_release_host(card->func); + sdio_set_drvdata(card->func, NULL); + } +} + +/* + * This function registers the SDIO device. + * + * SDIO IRQ is claimed, block size is set and driver data is initialized. + */ +static int mwifiex_register_dev(struct mwifiex_adapter *adapter) +{ + int ret = 0; + struct sdio_mmc_card *card = adapter->card; + struct sdio_func *func = card->func; + + /* save adapter pointer in card */ + card->adapter = adapter; + + sdio_claim_host(func); + + /* Request the SDIO IRQ */ + ret = sdio_claim_irq(func, mwifiex_sdio_interrupt); + if (ret) { + pr_err("claim irq failed: ret=%d\n", ret); + goto disable_func; + } + + /* Set block size */ + ret = sdio_set_block_size(card->func, MWIFIEX_SDIO_BLOCK_SIZE); + if (ret) { + pr_err("cannot set SDIO block size\n"); + ret = -1; + goto release_irq; + } + + sdio_release_host(func); + sdio_set_drvdata(func, card); + + adapter->dev = &func->dev; + + return 0; + +release_irq: + sdio_release_irq(func); +disable_func: + sdio_disable_func(func); + sdio_release_host(func); + adapter->card = NULL; + + return -1; +} + +/* + * This function initializes the SDIO driver. + * + * The following initializations steps are followed - + * - Read the Host interrupt status register to acknowledge + * the first interrupt got from bootloader + * - Disable host interrupt mask register + * - Get SDIO port + * - Get revision ID + * - Initialize SDIO variables in card + * - Allocate MP registers + * - Allocate MPA Tx and Rx buffers + */ +static int mwifiex_init_sdio(struct mwifiex_adapter *adapter) +{ + struct sdio_mmc_card *card = adapter->card; + int ret; + u32 sdio_ireg; + + /* + * Read the HOST_INT_STATUS_REG for ACK the first interrupt got + * from the bootloader. If we don't do this we get a interrupt + * as soon as we register the irq. + */ + mwifiex_read_reg(adapter, HOST_INTSTATUS_REG, &sdio_ireg); + + /* Disable host interrupt mask register for SDIO */ + mwifiex_sdio_disable_host_int(adapter); + + /* Get SDIO ioport */ + mwifiex_init_sdio_ioport(adapter); + + /* Get revision ID */ +#define REV_ID_REG 0x5c + mwifiex_read_reg(adapter, REV_ID_REG, &adapter->revision_id); + + /* Initialize SDIO variables in card */ + card->mp_rd_bitmap = 0; + card->mp_wr_bitmap = 0; + card->curr_rd_port = 1; + card->curr_wr_port = 1; + + card->mp_data_port_mask = DATA_PORT_MASK; + + card->mpa_tx.buf_len = 0; + card->mpa_tx.pkt_cnt = 0; + card->mpa_tx.start_port = 0; + + card->mpa_tx.enabled = 0; + card->mpa_tx.pkt_aggr_limit = SDIO_MP_AGGR_DEF_PKT_LIMIT; + + card->mpa_rx.buf_len = 0; + card->mpa_rx.pkt_cnt = 0; + card->mpa_rx.start_port = 0; + + card->mpa_rx.enabled = 0; + card->mpa_rx.pkt_aggr_limit = SDIO_MP_AGGR_DEF_PKT_LIMIT; + + /* Allocate buffers for SDIO MP-A */ + card->mp_regs = kzalloc(MAX_MP_REGS, GFP_KERNEL); + if (!card->mp_regs) { + dev_err(adapter->dev, "failed to alloc mp_regs\n"); + return -ENOMEM; + } + + ret = mwifiex_alloc_sdio_mpa_buffers(adapter, + SDIO_MP_TX_AGGR_DEF_BUF_SIZE, + SDIO_MP_RX_AGGR_DEF_BUF_SIZE); + if (ret) { + dev_err(adapter->dev, "failed to alloc sdio mp-a buffers\n"); + kfree(card->mp_regs); + return -1; + } + + return ret; +} + +/* + * This function resets the MPA Tx and Rx buffers. + */ +static void mwifiex_cleanup_mpa_buf(struct mwifiex_adapter *adapter) +{ + struct sdio_mmc_card *card = adapter->card; + + MP_TX_AGGR_BUF_RESET(card); + MP_RX_AGGR_BUF_RESET(card); +} + +/* + * This function cleans up the allocated card buffers. + * + * The following are freed by this function - + * - MP registers + * - MPA Tx buffer + * - MPA Rx buffer + */ +static void mwifiex_cleanup_sdio(struct mwifiex_adapter *adapter) +{ + struct sdio_mmc_card *card = adapter->card; + + kfree(card->mp_regs); + kfree(card->mpa_tx.buf); + kfree(card->mpa_rx.buf); +} + +/* + * This function updates the MP end port in card. + */ +static void +mwifiex_update_mp_end_port(struct mwifiex_adapter *adapter, u16 port) +{ + struct sdio_mmc_card *card = adapter->card; + int i; + + card->mp_end_port = port; + + card->mp_data_port_mask = DATA_PORT_MASK; + + for (i = 1; i <= MAX_PORT - card->mp_end_port; i++) + card->mp_data_port_mask &= ~(1 << (MAX_PORT - i)); + + card->curr_wr_port = 1; + + dev_dbg(adapter->dev, "cmd: mp_end_port %d, data port mask 0x%x\n", + port, card->mp_data_port_mask); +} + +static struct mwifiex_if_ops sdio_ops = { + .init_if = mwifiex_init_sdio, + .cleanup_if = mwifiex_cleanup_sdio, + .check_fw_status = mwifiex_check_fw_status, + .prog_fw = mwifiex_prog_fw_w_helper, + .register_dev = mwifiex_register_dev, + .unregister_dev = mwifiex_unregister_dev, + .enable_int = mwifiex_sdio_enable_host_int, + .process_int_status = mwifiex_process_int_status, + .host_to_card = mwifiex_sdio_host_to_card, + .wakeup = mwifiex_pm_wakeup_card, + .wakeup_complete = mwifiex_pm_wakeup_card_complete, + + /* SDIO specific */ + .update_mp_end_port = mwifiex_update_mp_end_port, + .cleanup_mpa_buf = mwifiex_cleanup_mpa_buf, +}; + +/* + * This function initializes the SDIO driver. + * + * This initiates the semaphore and registers the device with + * SDIO bus. + */ +static int +mwifiex_sdio_init_module(void) +{ + sema_init(&add_remove_card_sem, 1); + + return sdio_register_driver(&mwifiex_sdio); +} + +/* + * This function cleans up the SDIO driver. + * + * The following major steps are followed for cleanup - + * - Resume the device if its suspended + * - Disconnect the device if connected + * - Shutdown the firmware + * - Unregister the device from SDIO bus. + */ +static void +mwifiex_sdio_cleanup_module(void) +{ + struct mwifiex_adapter *adapter = g_adapter; + int i; + + if (down_interruptible(&add_remove_card_sem)) + goto exit_sem_err; + + if (!adapter || !adapter->priv_num) + goto exit; + + if (adapter->is_suspended) + mwifiex_sdio_resume(adapter->dev); + + for (i = 0; i < adapter->priv_num; i++) + if ((GET_BSS_ROLE(adapter->priv[i]) == MWIFIEX_BSS_ROLE_STA) && + adapter->priv[i]->media_connected) + mwifiex_deauthenticate(adapter->priv[i], NULL); + + if (!adapter->surprise_removed) + mwifiex_init_shutdown_fw(mwifiex_get_priv(adapter, + MWIFIEX_BSS_ROLE_ANY), + MWIFIEX_FUNC_SHUTDOWN); + +exit: + up(&add_remove_card_sem); + +exit_sem_err: + sdio_unregister_driver(&mwifiex_sdio); +} + +module_init(mwifiex_sdio_init_module); +module_exit(mwifiex_sdio_cleanup_module); + +MODULE_AUTHOR("Marvell International Ltd."); +MODULE_DESCRIPTION("Marvell WiFi-Ex SDIO Driver version " SDIO_VERSION); +MODULE_VERSION(SDIO_VERSION); +MODULE_LICENSE("GPL v2"); +MODULE_FIRMWARE("sd8787.bin"); |