diff options
Diffstat (limited to 'drivers/staging/rts_pstor/rtsx_transport.c')
| -rw-r--r-- | drivers/staging/rts_pstor/rtsx_transport.c | 769 |
1 files changed, 0 insertions, 769 deletions
diff --git a/drivers/staging/rts_pstor/rtsx_transport.c b/drivers/staging/rts_pstor/rtsx_transport.c deleted file mode 100644 index 1f9a42480443..000000000000 --- a/drivers/staging/rts_pstor/rtsx_transport.c +++ /dev/null @@ -1,769 +0,0 @@ -/* Driver for Realtek PCI-Express card reader - * - * Copyright(c) 2009 Realtek Semiconductor Corp. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2, or (at your option) any - * later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, see <http://www.gnu.org/licenses/>. - * - * Author: - * wwang (wei_wang@realsil.com.cn) - * No. 450, Shenhu Road, Suzhou Industry Park, Suzhou, China - */ - -#include <linux/blkdev.h> -#include <linux/kthread.h> -#include <linux/sched.h> - -#include "rtsx.h" -#include "rtsx_scsi.h" -#include "rtsx_transport.h" -#include "rtsx_chip.h" -#include "rtsx_card.h" -#include "debug.h" - -/*********************************************************************** - * Scatter-gather transfer buffer access routines - ***********************************************************************/ - -/* Copy a buffer of length buflen to/from the srb's transfer buffer. - * (Note: for scatter-gather transfers (srb->use_sg > 0), srb->request_buffer - * points to a list of s-g entries and we ignore srb->request_bufflen. - * For non-scatter-gather transfers, srb->request_buffer points to the - * transfer buffer itself and srb->request_bufflen is the buffer's length.) - * Update the *index and *offset variables so that the next copy will - * pick up from where this one left off. */ - -unsigned int rtsx_stor_access_xfer_buf(unsigned char *buffer, - unsigned int buflen, struct scsi_cmnd *srb, unsigned int *index, - unsigned int *offset, enum xfer_buf_dir dir) -{ - unsigned int cnt; - - /* If not using scatter-gather, just transfer the data directly. - * Make certain it will fit in the available buffer space. */ - if (scsi_sg_count(srb) == 0) { - if (*offset >= scsi_bufflen(srb)) - return 0; - cnt = min(buflen, scsi_bufflen(srb) - *offset); - if (dir == TO_XFER_BUF) - memcpy((unsigned char *) scsi_sglist(srb) + *offset, - buffer, cnt); - else - memcpy(buffer, (unsigned char *) scsi_sglist(srb) + - *offset, cnt); - *offset += cnt; - - /* Using scatter-gather. We have to go through the list one entry - * at a time. Each s-g entry contains some number of pages, and - * each page has to be kmap()'ed separately. If the page is already - * in kernel-addressable memory then kmap() will return its address. - * If the page is not directly accessible -- such as a user buffer - * located in high memory -- then kmap() will map it to a temporary - * position in the kernel's virtual address space. */ - } else { - struct scatterlist *sg = - (struct scatterlist *) scsi_sglist(srb) - + *index; - - /* This loop handles a single s-g list entry, which may - * include multiple pages. Find the initial page structure - * and the starting offset within the page, and update - * the *offset and *index values for the next loop. */ - cnt = 0; - while (cnt < buflen && *index < scsi_sg_count(srb)) { - struct page *page = sg_page(sg) + - ((sg->offset + *offset) >> PAGE_SHIFT); - unsigned int poff = - (sg->offset + *offset) & (PAGE_SIZE-1); - unsigned int sglen = sg->length - *offset; - - if (sglen > buflen - cnt) { - - /* Transfer ends within this s-g entry */ - sglen = buflen - cnt; - *offset += sglen; - } else { - - /* Transfer continues to next s-g entry */ - *offset = 0; - ++*index; - ++sg; - } - - /* Transfer the data for all the pages in this - * s-g entry. For each page: call kmap(), do the - * transfer, and call kunmap() immediately after. */ - while (sglen > 0) { - unsigned int plen = min(sglen, (unsigned int) - PAGE_SIZE - poff); - unsigned char *ptr = kmap(page); - - if (dir == TO_XFER_BUF) - memcpy(ptr + poff, buffer + cnt, plen); - else - memcpy(buffer + cnt, ptr + poff, plen); - kunmap(page); - - /* Start at the beginning of the next page */ - poff = 0; - ++page; - cnt += plen; - sglen -= plen; - } - } - } - - /* Return the amount actually transferred */ - return cnt; -} - -/* Store the contents of buffer into srb's transfer buffer and set the -* SCSI residue. */ -void rtsx_stor_set_xfer_buf(unsigned char *buffer, - unsigned int buflen, struct scsi_cmnd *srb) -{ - unsigned int index = 0, offset = 0; - - rtsx_stor_access_xfer_buf(buffer, buflen, srb, &index, &offset, - TO_XFER_BUF); - if (buflen < scsi_bufflen(srb)) - scsi_set_resid(srb, scsi_bufflen(srb) - buflen); -} - -void rtsx_stor_get_xfer_buf(unsigned char *buffer, - unsigned int buflen, struct scsi_cmnd *srb) -{ - unsigned int index = 0, offset = 0; - - rtsx_stor_access_xfer_buf(buffer, buflen, srb, &index, &offset, - FROM_XFER_BUF); - if (buflen < scsi_bufflen(srb)) - scsi_set_resid(srb, scsi_bufflen(srb) - buflen); -} - - -/*********************************************************************** - * Transport routines - ***********************************************************************/ - -/* Invoke the transport and basic error-handling/recovery methods - * - * This is used to send the message to the device and receive the response. - */ -void rtsx_invoke_transport(struct scsi_cmnd *srb, struct rtsx_chip *chip) -{ - int result; - - result = rtsx_scsi_handler(srb, chip); - - /* if the command gets aborted by the higher layers, we need to - * short-circuit all other processing - */ - if (rtsx_chk_stat(chip, RTSX_STAT_ABORT)) { - RTSX_DEBUGP("-- command was aborted\n"); - srb->result = DID_ABORT << 16; - goto Handle_Errors; - } - - /* if there is a transport error, reset and don't auto-sense */ - if (result == TRANSPORT_ERROR) { - RTSX_DEBUGP("-- transport indicates error, resetting\n"); - srb->result = DID_ERROR << 16; - goto Handle_Errors; - } - - srb->result = SAM_STAT_GOOD; - - /* - * If we have a failure, we're going to do a REQUEST_SENSE - * automatically. Note that we differentiate between a command - * "failure" and an "error" in the transport mechanism. - */ - if (result == TRANSPORT_FAILED) { - /* set the result so the higher layers expect this data */ - srb->result = SAM_STAT_CHECK_CONDITION; - memcpy(srb->sense_buffer, - (unsigned char *)&(chip->sense_buffer[SCSI_LUN(srb)]), - sizeof(struct sense_data_t)); - } - - return; - - /* Error and abort processing: try to resynchronize with the device - * by issuing a port reset. If that fails, try a class-specific - * device reset. */ -Handle_Errors: - return; -} - -void rtsx_add_cmd(struct rtsx_chip *chip, - u8 cmd_type, u16 reg_addr, u8 mask, u8 data) -{ - u32 *cb = (u32 *)(chip->host_cmds_ptr); - u32 val = 0; - - val |= (u32)(cmd_type & 0x03) << 30; - val |= (u32)(reg_addr & 0x3FFF) << 16; - val |= (u32)mask << 8; - val |= (u32)data; - - spin_lock_irq(&chip->rtsx->reg_lock); - if (chip->ci < (HOST_CMDS_BUF_LEN / 4)) - cb[(chip->ci)++] = cpu_to_le32(val); - - spin_unlock_irq(&chip->rtsx->reg_lock); -} - -void rtsx_send_cmd_no_wait(struct rtsx_chip *chip) -{ - u32 val = 1 << 31; - - rtsx_writel(chip, RTSX_HCBAR, chip->host_cmds_addr); - - val |= (u32)(chip->ci * 4) & 0x00FFFFFF; - /* Hardware Auto Response */ - val |= 0x40000000; - rtsx_writel(chip, RTSX_HCBCTLR, val); -} - -int rtsx_send_cmd(struct rtsx_chip *chip, u8 card, int timeout) -{ - struct rtsx_dev *rtsx = chip->rtsx; - struct completion trans_done; - u32 val = 1 << 31; - long timeleft; - int err = 0; - - if (card == SD_CARD) - rtsx->check_card_cd = SD_EXIST; - else if (card == MS_CARD) - rtsx->check_card_cd = MS_EXIST; - else if (card == XD_CARD) - rtsx->check_card_cd = XD_EXIST; - else - rtsx->check_card_cd = 0; - - spin_lock_irq(&rtsx->reg_lock); - - /* set up data structures for the wakeup system */ - rtsx->done = &trans_done; - rtsx->trans_result = TRANS_NOT_READY; - init_completion(&trans_done); - rtsx->trans_state = STATE_TRANS_CMD; - - rtsx_writel(chip, RTSX_HCBAR, chip->host_cmds_addr); - - val |= (u32)(chip->ci * 4) & 0x00FFFFFF; - /* Hardware Auto Response */ - val |= 0x40000000; - rtsx_writel(chip, RTSX_HCBCTLR, val); - - spin_unlock_irq(&rtsx->reg_lock); - - /* Wait for TRANS_OK_INT */ - timeleft = wait_for_completion_interruptible_timeout( - &trans_done, timeout * HZ / 1000); - if (timeleft <= 0) { - RTSX_DEBUGP("chip->int_reg = 0x%x\n", chip->int_reg); - err = -ETIMEDOUT; - TRACE_GOTO(chip, finish_send_cmd); - } - - spin_lock_irq(&rtsx->reg_lock); - if (rtsx->trans_result == TRANS_RESULT_FAIL) - err = -EIO; - else if (rtsx->trans_result == TRANS_RESULT_OK) - err = 0; - - spin_unlock_irq(&rtsx->reg_lock); - -finish_send_cmd: - rtsx->done = NULL; - rtsx->trans_state = STATE_TRANS_NONE; - - if (err < 0) - rtsx_stop_cmd(chip, card); - - return err; -} - -static inline void rtsx_add_sg_tbl( - struct rtsx_chip *chip, u32 addr, u32 len, u8 option) -{ - u64 *sgb = (u64 *)(chip->host_sg_tbl_ptr); - u64 val = 0; - u32 temp_len = 0; - u8 temp_opt = 0; - - do { - if (len > 0x80000) { - temp_len = 0x80000; - temp_opt = option & (~SG_END); - } else { - temp_len = len; - temp_opt = option; - } - val = ((u64)addr << 32) | ((u64)temp_len << 12) | temp_opt; - - if (chip->sgi < (HOST_SG_TBL_BUF_LEN / 8)) - sgb[(chip->sgi)++] = cpu_to_le64(val); - - len -= temp_len; - addr += temp_len; - } while (len); -} - -static int rtsx_transfer_sglist_adma_partial(struct rtsx_chip *chip, u8 card, - struct scatterlist *sg, int num_sg, unsigned int *index, - unsigned int *offset, int size, - enum dma_data_direction dma_dir, int timeout) -{ - struct rtsx_dev *rtsx = chip->rtsx; - struct completion trans_done; - u8 dir; - int sg_cnt, i, resid; - int err = 0; - long timeleft; - struct scatterlist *sg_ptr; - u32 val = TRIG_DMA; - - if ((sg == NULL) || (num_sg <= 0) || !offset || !index) - return -EIO; - - if (dma_dir == DMA_TO_DEVICE) - dir = HOST_TO_DEVICE; - else if (dma_dir == DMA_FROM_DEVICE) - dir = DEVICE_TO_HOST; - else - return -ENXIO; - - if (card == SD_CARD) - rtsx->check_card_cd = SD_EXIST; - else if (card == MS_CARD) - rtsx->check_card_cd = MS_EXIST; - else if (card == XD_CARD) - rtsx->check_card_cd = XD_EXIST; - else - rtsx->check_card_cd = 0; - - spin_lock_irq(&rtsx->reg_lock); - - /* set up data structures for the wakeup system */ - rtsx->done = &trans_done; - - rtsx->trans_state = STATE_TRANS_SG; - rtsx->trans_result = TRANS_NOT_READY; - - spin_unlock_irq(&rtsx->reg_lock); - - sg_cnt = dma_map_sg(&(rtsx->pci->dev), sg, num_sg, dma_dir); - - resid = size; - sg_ptr = sg; - chip->sgi = 0; - /* Usually the next entry will be @sg@ + 1, but if this sg element - * is part of a chained scatterlist, it could jump to the start of - * a new scatterlist array. So here we use sg_next to move to - * the proper sg - */ - for (i = 0; i < *index; i++) - sg_ptr = sg_next(sg_ptr); - for (i = *index; i < sg_cnt; i++) { - dma_addr_t addr; - unsigned int len; - u8 option; - - addr = sg_dma_address(sg_ptr); - len = sg_dma_len(sg_ptr); - - RTSX_DEBUGP("DMA addr: 0x%x, Len: 0x%x\n", - (unsigned int)addr, len); - RTSX_DEBUGP("*index = %d, *offset = %d\n", *index, *offset); - - addr += *offset; - - if ((len - *offset) > resid) { - *offset += resid; - len = resid; - resid = 0; - } else { - resid -= (len - *offset); - len -= *offset; - *offset = 0; - *index = *index + 1; - } - if ((i == (sg_cnt - 1)) || !resid) - option = SG_VALID | SG_END | SG_TRANS_DATA; - else - option = SG_VALID | SG_TRANS_DATA; - - rtsx_add_sg_tbl(chip, (u32)addr, (u32)len, option); - - if (!resid) - break; - - sg_ptr = sg_next(sg_ptr); - } - - RTSX_DEBUGP("SG table count = %d\n", chip->sgi); - - val |= (u32)(dir & 0x01) << 29; - val |= ADMA_MODE; - - spin_lock_irq(&rtsx->reg_lock); - - init_completion(&trans_done); - - rtsx_writel(chip, RTSX_HDBAR, chip->host_sg_tbl_addr); - rtsx_writel(chip, RTSX_HDBCTLR, val); - - spin_unlock_irq(&rtsx->reg_lock); - - timeleft = wait_for_completion_interruptible_timeout( - &trans_done, timeout * HZ / 1000); - if (timeleft <= 0) { - RTSX_DEBUGP("Timeout (%s %d)\n", __func__, __LINE__); - RTSX_DEBUGP("chip->int_reg = 0x%x\n", chip->int_reg); - err = -ETIMEDOUT; - goto out; - } - - spin_lock_irq(&rtsx->reg_lock); - if (rtsx->trans_result == TRANS_RESULT_FAIL) { - err = -EIO; - spin_unlock_irq(&rtsx->reg_lock); - goto out; - } - spin_unlock_irq(&rtsx->reg_lock); - - /* Wait for TRANS_OK_INT */ - spin_lock_irq(&rtsx->reg_lock); - if (rtsx->trans_result == TRANS_NOT_READY) { - init_completion(&trans_done); - spin_unlock_irq(&rtsx->reg_lock); - timeleft = wait_for_completion_interruptible_timeout( - &trans_done, timeout * HZ / 1000); - if (timeleft <= 0) { - RTSX_DEBUGP("Timeout (%s %d)\n", __func__, __LINE__); - RTSX_DEBUGP("chip->int_reg = 0x%x\n", chip->int_reg); - err = -ETIMEDOUT; - goto out; - } - } else { - spin_unlock_irq(&rtsx->reg_lock); - } - - spin_lock_irq(&rtsx->reg_lock); - if (rtsx->trans_result == TRANS_RESULT_FAIL) - err = -EIO; - else if (rtsx->trans_result == TRANS_RESULT_OK) - err = 0; - - spin_unlock_irq(&rtsx->reg_lock); - -out: - rtsx->done = NULL; - rtsx->trans_state = STATE_TRANS_NONE; - dma_unmap_sg(&(rtsx->pci->dev), sg, num_sg, dma_dir); - - if (err < 0) - rtsx_stop_cmd(chip, card); - - return err; -} - -static int rtsx_transfer_sglist_adma(struct rtsx_chip *chip, u8 card, - struct scatterlist *sg, int num_sg, - enum dma_data_direction dma_dir, int timeout) -{ - struct rtsx_dev *rtsx = chip->rtsx; - struct completion trans_done; - u8 dir; - int buf_cnt, i; - int err = 0; - long timeleft; - struct scatterlist *sg_ptr; - - if ((sg == NULL) || (num_sg <= 0)) - return -EIO; - - if (dma_dir == DMA_TO_DEVICE) - dir = HOST_TO_DEVICE; - else if (dma_dir == DMA_FROM_DEVICE) - dir = DEVICE_TO_HOST; - else - return -ENXIO; - - if (card == SD_CARD) - rtsx->check_card_cd = SD_EXIST; - else if (card == MS_CARD) - rtsx->check_card_cd = MS_EXIST; - else if (card == XD_CARD) - rtsx->check_card_cd = XD_EXIST; - else - rtsx->check_card_cd = 0; - - spin_lock_irq(&rtsx->reg_lock); - - /* set up data structures for the wakeup system */ - rtsx->done = &trans_done; - - rtsx->trans_state = STATE_TRANS_SG; - rtsx->trans_result = TRANS_NOT_READY; - - spin_unlock_irq(&rtsx->reg_lock); - - buf_cnt = dma_map_sg(&(rtsx->pci->dev), sg, num_sg, dma_dir); - - sg_ptr = sg; - - for (i = 0; i <= buf_cnt / (HOST_SG_TBL_BUF_LEN / 8); i++) { - u32 val = TRIG_DMA; - int sg_cnt, j; - - if (i == buf_cnt / (HOST_SG_TBL_BUF_LEN / 8)) - sg_cnt = buf_cnt % (HOST_SG_TBL_BUF_LEN / 8); - else - sg_cnt = (HOST_SG_TBL_BUF_LEN / 8); - - chip->sgi = 0; - for (j = 0; j < sg_cnt; j++) { - dma_addr_t addr = sg_dma_address(sg_ptr); - unsigned int len = sg_dma_len(sg_ptr); - u8 option; - - RTSX_DEBUGP("DMA addr: 0x%x, Len: 0x%x\n", - (unsigned int)addr, len); - - if (j == (sg_cnt - 1)) - option = SG_VALID | SG_END | SG_TRANS_DATA; - else - option = SG_VALID | SG_TRANS_DATA; - - rtsx_add_sg_tbl(chip, (u32)addr, (u32)len, option); - - sg_ptr = sg_next(sg_ptr); - } - - RTSX_DEBUGP("SG table count = %d\n", chip->sgi); - - val |= (u32)(dir & 0x01) << 29; - val |= ADMA_MODE; - - spin_lock_irq(&rtsx->reg_lock); - - init_completion(&trans_done); - - rtsx_writel(chip, RTSX_HDBAR, chip->host_sg_tbl_addr); - rtsx_writel(chip, RTSX_HDBCTLR, val); - - spin_unlock_irq(&rtsx->reg_lock); - - timeleft = wait_for_completion_interruptible_timeout( - &trans_done, timeout * HZ / 1000); - if (timeleft <= 0) { - RTSX_DEBUGP("Timeout (%s %d)\n", __func__, __LINE__); - RTSX_DEBUGP("chip->int_reg = 0x%x\n", chip->int_reg); - err = -ETIMEDOUT; - goto out; - } - - spin_lock_irq(&rtsx->reg_lock); - if (rtsx->trans_result == TRANS_RESULT_FAIL) { - err = -EIO; - spin_unlock_irq(&rtsx->reg_lock); - goto out; - } - spin_unlock_irq(&rtsx->reg_lock); - - sg_ptr += sg_cnt; - } - - /* Wait for TRANS_OK_INT */ - spin_lock_irq(&rtsx->reg_lock); - if (rtsx->trans_result == TRANS_NOT_READY) { - init_completion(&trans_done); - spin_unlock_irq(&rtsx->reg_lock); - timeleft = wait_for_completion_interruptible_timeout( - &trans_done, timeout * HZ / 1000); - if (timeleft <= 0) { - RTSX_DEBUGP("Timeout (%s %d)\n", __func__, __LINE__); - RTSX_DEBUGP("chip->int_reg = 0x%x\n", chip->int_reg); - err = -ETIMEDOUT; - goto out; - } - } else { - spin_unlock_irq(&rtsx->reg_lock); - } - - spin_lock_irq(&rtsx->reg_lock); - if (rtsx->trans_result == TRANS_RESULT_FAIL) - err = -EIO; - else if (rtsx->trans_result == TRANS_RESULT_OK) - err = 0; - - spin_unlock_irq(&rtsx->reg_lock); - -out: - rtsx->done = NULL; - rtsx->trans_state = STATE_TRANS_NONE; - dma_unmap_sg(&(rtsx->pci->dev), sg, num_sg, dma_dir); - - if (err < 0) - rtsx_stop_cmd(chip, card); - - return err; -} - -static int rtsx_transfer_buf(struct rtsx_chip *chip, u8 card, void *buf, size_t len, - enum dma_data_direction dma_dir, int timeout) -{ - struct rtsx_dev *rtsx = chip->rtsx; - struct completion trans_done; - dma_addr_t addr; - u8 dir; - int err = 0; - u32 val = (1 << 31); - long timeleft; - - if ((buf == NULL) || (len <= 0)) - return -EIO; - - if (dma_dir == DMA_TO_DEVICE) - dir = HOST_TO_DEVICE; - else if (dma_dir == DMA_FROM_DEVICE) - dir = DEVICE_TO_HOST; - else - return -ENXIO; - - addr = dma_map_single(&(rtsx->pci->dev), buf, len, dma_dir); - if (!addr) - return -ENOMEM; - - if (card == SD_CARD) - rtsx->check_card_cd = SD_EXIST; - else if (card == MS_CARD) - rtsx->check_card_cd = MS_EXIST; - else if (card == XD_CARD) - rtsx->check_card_cd = XD_EXIST; - else - rtsx->check_card_cd = 0; - - val |= (u32)(dir & 0x01) << 29; - val |= (u32)(len & 0x00FFFFFF); - - spin_lock_irq(&rtsx->reg_lock); - - /* set up data structures for the wakeup system */ - rtsx->done = &trans_done; - - init_completion(&trans_done); - - rtsx->trans_state = STATE_TRANS_BUF; - rtsx->trans_result = TRANS_NOT_READY; - - rtsx_writel(chip, RTSX_HDBAR, addr); - rtsx_writel(chip, RTSX_HDBCTLR, val); - - spin_unlock_irq(&rtsx->reg_lock); - - /* Wait for TRANS_OK_INT */ - timeleft = wait_for_completion_interruptible_timeout( - &trans_done, timeout * HZ / 1000); - if (timeleft <= 0) { - RTSX_DEBUGP("Timeout (%s %d)\n", __func__, __LINE__); - RTSX_DEBUGP("chip->int_reg = 0x%x\n", chip->int_reg); - err = -ETIMEDOUT; - goto out; - } - - spin_lock_irq(&rtsx->reg_lock); - if (rtsx->trans_result == TRANS_RESULT_FAIL) - err = -EIO; - else if (rtsx->trans_result == TRANS_RESULT_OK) - err = 0; - - spin_unlock_irq(&rtsx->reg_lock); - -out: - rtsx->done = NULL; - rtsx->trans_state = STATE_TRANS_NONE; - dma_unmap_single(&(rtsx->pci->dev), addr, len, dma_dir); - - if (err < 0) - rtsx_stop_cmd(chip, card); - - return err; -} - -int rtsx_transfer_data_partial(struct rtsx_chip *chip, u8 card, - void *buf, size_t len, int use_sg, unsigned int *index, - unsigned int *offset, enum dma_data_direction dma_dir, - int timeout) -{ - int err = 0; - - /* don't transfer data during abort processing */ - if (rtsx_chk_stat(chip, RTSX_STAT_ABORT)) - return -EIO; - - if (use_sg) { - err = rtsx_transfer_sglist_adma_partial(chip, card, - (struct scatterlist *)buf, use_sg, - index, offset, (int)len, dma_dir, timeout); - } else { - err = rtsx_transfer_buf(chip, card, - buf, len, dma_dir, timeout); - } - - if (err < 0) { - if (RTSX_TST_DELINK(chip)) { - RTSX_CLR_DELINK(chip); - chip->need_reinit = SD_CARD | MS_CARD | XD_CARD; - rtsx_reinit_cards(chip, 1); - } - } - - return err; -} - -int rtsx_transfer_data(struct rtsx_chip *chip, u8 card, void *buf, size_t len, - int use_sg, enum dma_data_direction dma_dir, int timeout) -{ - int err = 0; - - RTSX_DEBUGP("use_sg = %d\n", use_sg); - - /* don't transfer data during abort processing */ - if (rtsx_chk_stat(chip, RTSX_STAT_ABORT)) - return -EIO; - - if (use_sg) { - err = rtsx_transfer_sglist_adma(chip, card, - (struct scatterlist *)buf, - use_sg, dma_dir, timeout); - } else { - err = rtsx_transfer_buf(chip, card, buf, len, dma_dir, timeout); - } - - if (err < 0) { - if (RTSX_TST_DELINK(chip)) { - RTSX_CLR_DELINK(chip); - chip->need_reinit = SD_CARD | MS_CARD | XD_CARD; - rtsx_reinit_cards(chip, 1); - } - } - - return err; -} - |