| /* |
| * SdioAdapter.c |
| * |
| * Copyright(c) 1998 - 2009 Texas Instruments. All rights reserved. |
| * Copyright(c) 2008 - 2009 Google, Inc. All rights reserved. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name Texas Instruments nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** \file SdioAdapter.c |
| * \brief The SDIO driver adapter. Platform dependent. |
| * |
| * An adaptation layer between the lower SDIO driver (in BSP) and the upper Sdio |
| * Used for issuing all SDIO transaction types towards the lower SDIO-driver. |
| * Makes the decision whether to use Sync or Async transaction, and reflects it |
| * by the return value and calling its callback in case of Async. |
| * |
| * \see SdioAdapter.h, SdioDrv.c & h |
| */ |
| |
| #ifdef CONFIG_MMC_EMBEDDED_SDIO |
| #include <linux/kernel.h> |
| #include <linux/mutex.h> |
| #include <linux/mmc/core.h> |
| #include <linux/mmc/card.h> |
| #include <linux/mmc/sdio_func.h> |
| #include <linux/mmc/sdio_ids.h> |
| #include "TxnDefs.h" |
| |
| #define TI_SDIO_DEBUG |
| |
| #define TIWLAN_MMC_MAX_DMA 8192 |
| |
| int wifi_set_carddetect( int on ); |
| |
| static struct sdio_func *tiwlan_func = NULL; |
| static struct completion sdio_wait; |
| |
| ETxnStatus sdioAdapt_TransactBytes (unsigned int uFuncId, |
| unsigned int uHwAddr, |
| void * pHostAddr, |
| unsigned int uLength, |
| unsigned int bDirection, |
| unsigned int bMore); |
| |
| static int sdio_wifi_probe(struct sdio_func *func, |
| const struct sdio_device_id *id) |
| { |
| int rc; |
| |
| printk("%s: %d\n", __FUNCTION__, func->class); |
| |
| if (func->class != SDIO_CLASS_WLAN) |
| return -EINVAL; |
| |
| sdio_claim_host(func); |
| |
| rc = sdio_enable_func(func); |
| if (rc) |
| goto err1; |
| rc = sdio_set_block_size(func, 512); |
| |
| if (rc) { |
| printk("%s: Unable to set blocksize\n", __FUNCTION__); |
| goto err2; |
| } |
| |
| tiwlan_func = func; |
| complete(&sdio_wait); |
| return 0; |
| err2: |
| sdio_disable_func(func); |
| err1: |
| sdio_release_host(func); |
| complete(&sdio_wait); |
| return rc; |
| } |
| |
| static void sdio_wifi_remove(struct sdio_func *func) |
| { |
| } |
| |
| static const struct sdio_device_id sdio_wifi_ids[] = { |
| { SDIO_DEVICE_CLASS(SDIO_CLASS_WLAN) }, |
| { }, |
| }; |
| |
| MODULE_DEVICE_TABLE(sdio, sdio_wifi_ids); |
| |
| static struct sdio_driver sdio_wifi_driver = { |
| .probe = sdio_wifi_probe, |
| .remove = sdio_wifi_remove, |
| .name = "sdio_wifi", |
| .id_table = sdio_wifi_ids, |
| }; |
| |
| ETxnStatus sdioAdapt_TransactBytes (unsigned int uFuncId, |
| unsigned int uHwAddr, |
| void * pHostAddr, |
| unsigned int uLength, |
| unsigned int bDirection, |
| unsigned int bMore); |
| |
| int sdioAdapt_ConnectBus (void * fCbFunc, |
| void * hCbArg, |
| unsigned int uBlkSizeShift, |
| unsigned int uSdioThreadPriority, |
| unsigned char **pTxDmaSrcAddr) |
| { |
| int rc; |
| |
| init_completion(&sdio_wait); |
| wifi_set_carddetect( 1 ); |
| rc = sdio_register_driver(&sdio_wifi_driver); |
| if (rc < 0) { |
| printk(KERN_ERR "%s: Fail to register sdio_wifi_driver\n", __func__); |
| return rc; |
| } |
| if (!wait_for_completion_timeout(&sdio_wait, msecs_to_jiffies(10000))) { |
| printk(KERN_ERR "%s: Timed out waiting for device detect\n", __func__); |
| sdio_unregister_driver(&sdio_wifi_driver); |
| return -ENODEV; |
| } |
| /* Provide the DMA buffer address to the upper layer so it will use it as the transactions host buffer. */ |
| if (pTxDmaSrcAddr) { /* Dm: check what to do with it */ |
| *pTxDmaSrcAddr = kmalloc(TIWLAN_MMC_MAX_DMA, GFP_ATOMIC | GFP_DMA); |
| } |
| return 0; |
| } |
| |
| int sdioAdapt_DisconnectBus (void) |
| { |
| if (tiwlan_func) { |
| sdio_disable_func( tiwlan_func ); |
| sdio_release_host( tiwlan_func ); |
| } |
| wifi_set_carddetect( 0 ); |
| sdio_unregister_driver(&sdio_wifi_driver); |
| return 0; |
| } |
| |
| ETxnStatus sdioAdapt_TransactBytes (unsigned int uFuncId, |
| unsigned int uHwAddr, |
| void * pHostAddr, |
| unsigned int uLength, |
| unsigned int bDirection, |
| unsigned int bMore) |
| { |
| unsigned char *pData = pHostAddr; |
| unsigned int i; |
| int rc = 0, final_rc = 0; |
| |
| for (i = 0; i < uLength; i++) { |
| if( bDirection ) { |
| if (uFuncId == 0) |
| *pData = (unsigned char)sdio_f0_readb(tiwlan_func, uHwAddr, &rc); |
| else |
| *pData = (unsigned char)sdio_readb(tiwlan_func, uHwAddr, &rc); |
| } |
| else { |
| if (uFuncId == 0) |
| sdio_f0_writeb(tiwlan_func, *pData, uHwAddr, &rc); |
| else |
| sdio_writeb(tiwlan_func, *pData, uHwAddr, &rc); |
| } |
| if( rc ) { |
| final_rc = rc; |
| } |
| #ifdef TI_SDIO_DEBUG |
| printk(KERN_INFO "%c52: [0x%x](%u) %c 0x%x\n", (bDirection ? 'R' : 'W'), uHwAddr, uLength, (bDirection ? '=' : '<'), (unsigned)*pData); |
| #endif |
| uHwAddr++; |
| pData++; |
| } |
| /* If failed return ERROR, if succeeded return COMPLETE */ |
| if (final_rc) { |
| return TXN_STATUS_ERROR; |
| } |
| return TXN_STATUS_COMPLETE; |
| } |
| |
| ETxnStatus sdioAdapt_Transact (unsigned int uFuncId, |
| unsigned int uHwAddr, |
| void * pHostAddr, |
| unsigned int uLength, |
| unsigned int bDirection, |
| unsigned int bBlkMode, |
| unsigned int bFixedAddr, |
| unsigned int bMore) |
| { |
| int rc; |
| |
| if (uFuncId == 0) |
| return sdioAdapt_TransactBytes (uFuncId, uHwAddr, pHostAddr, |
| uLength, bDirection, bMore); |
| if (bDirection) { |
| if (bFixedAddr) |
| rc = sdio_memcpy_fromio(tiwlan_func, pHostAddr, uHwAddr, uLength); |
| else |
| rc = sdio_readsb(tiwlan_func, pHostAddr, uHwAddr, uLength); |
| |
| } |
| else { |
| if (bFixedAddr) |
| rc = sdio_memcpy_toio(tiwlan_func, uHwAddr, pHostAddr, uLength); |
| else |
| rc = sdio_writesb(tiwlan_func, uHwAddr, pHostAddr, uLength); |
| } |
| #ifdef TI_SDIO_DEBUG |
| if (uLength == 1) |
| printk(KERN_INFO "%c53: [0x%x](%u) %c 0x%x\n", (bDirection ? 'R' : 'W'), uHwAddr, uLength, (bDirection ? '=' : '<'), (unsigned)(*(char *)pHostAddr)); |
| else if (uLength == 2) |
| printk(KERN_INFO "%c53: [0x%x](%u) %c 0x%x\n", (bDirection ? 'R' : 'W'), uHwAddr, uLength, (bDirection ? '=' : '<'), (unsigned)(*(short *)pHostAddr)); |
| else if (uLength == 4) |
| printk(KERN_INFO "%c53: [0x%x](%u) %c 0x%x\n", (bDirection ? 'R' : 'W'), uHwAddr, uLength, (bDirection ? '=' : '<'), (unsigned)(*(long *)pHostAddr)); |
| else |
| printk(KERN_INFO "%c53: [0x%x](%u) F[%d] B[%d] I[%d] = %d\n", (bDirection ? 'R' : 'W'), uHwAddr, uLength, uFuncId, bBlkMode, bFixedAddr, rc); |
| #endif |
| /* If failed return ERROR, if succeeded return COMPLETE */ |
| if (rc) { |
| return TXN_STATUS_ERROR; |
| } |
| return TXN_STATUS_COMPLETE; |
| } |
| |
| #else |
| |
| #include "SdioDrvDbg.h" |
| #include "TxnDefs.h" |
| #include "SdioAdapter.h" |
| #include "SdioDrv.h" |
| #include "bmtrace_api.h" |
| #include <linux/slab.h> |
| |
| #ifdef SDIO_1_BIT /* see also in SdioDrv.c */ |
| #define SDIO_BITS_CODE 0x80 /* 1 bits */ |
| #else |
| #define SDIO_BITS_CODE 0x82 /* 4 bits */ |
| #endif |
| |
| static unsigned char *pDmaBufAddr = 0; |
| |
| /************************************************************************ |
| * Defines |
| ************************************************************************/ |
| /* Sync/Async Threshold */ |
| #ifdef FULL_ASYNC_MODE |
| #define SYNC_ASYNC_LENGTH_THRESH 0 /* Use Async for all transactions */ |
| #else |
| #define SYNC_ASYNC_LENGTH_THRESH 360 /* Use Async for transactions longer than this threshold (in bytes) */ |
| #endif |
| |
| #define MAX_RETRIES 10 |
| |
| #define MAX_BUS_TXN_SIZE 8192 /* Max bus transaction size in bytes (for the DMA buffer allocation) */ |
| |
| /* For block mode configuration */ |
| #define FN0_FBR2_REG_108 0x210 |
| #define FN0_FBR2_REG_108_BIT_MASK 0xFFF |
| |
| int sdioAdapt_ConnectBus (void * fCbFunc, |
| void * hCbArg, |
| unsigned int uBlkSizeShift, |
| unsigned int uSdioThreadPriority, |
| unsigned char **pRxDmaBufAddr, |
| unsigned int *pRxDmaBufLen, |
| unsigned char **pTxDmaBufAddr, |
| unsigned int *pTxDmaBufLen) |
| { |
| unsigned char uByte; |
| unsigned long uLong; |
| unsigned long uCount = 0; |
| unsigned int uBlkSize = 1 << uBlkSizeShift; |
| int iStatus; |
| |
| if (uBlkSize < SYNC_ASYNC_LENGTH_THRESH) |
| { |
| PERR1("%s(): Block-Size should be bigger than SYNC_ASYNC_LENGTH_THRESH!!\n", __FUNCTION__ ); |
| } |
| |
| /* Enabling clocks if thet are not enabled */ |
| sdioDrv_clk_enable(); |
| |
| /* Allocate a DMA-able buffer and provide it to the upper layer to be used for all read and write transactions */ |
| if (pDmaBufAddr == 0) /* allocate only once (in case this function is called multiple times) */ |
| { |
| pDmaBufAddr = kmalloc (MAX_BUS_TXN_SIZE, GFP_ATOMIC | GFP_DMA); |
| if (pDmaBufAddr == 0) |
| { |
| iStatus = -1; |
| goto fail; |
| } |
| } |
| *pRxDmaBufAddr = *pTxDmaBufAddr = pDmaBufAddr; |
| *pRxDmaBufLen = *pTxDmaBufLen = MAX_BUS_TXN_SIZE; |
| |
| /* Init SDIO driver and HW */ |
| iStatus = sdioDrv_ConnectBus (fCbFunc, hCbArg, uBlkSizeShift, uSdioThreadPriority); |
| if (iStatus) { goto fail; } |
| |
| /* Send commands sequence: 0, 5, 3, 7 */ |
| iStatus = sdioDrv_ExecuteCmd (SD_IO_GO_IDLE_STATE, 0, MMC_RSP_NONE, &uByte, sizeof(uByte)); |
| if (iStatus) |
| { |
| printk("%s %d command number: %d failed\n", __FUNCTION__, __LINE__, SD_IO_GO_IDLE_STATE); |
| goto fail; |
| } |
| |
| iStatus = sdioDrv_ExecuteCmd (SDIO_CMD5, VDD_VOLTAGE_WINDOW, MMC_RSP_R4, &uByte, sizeof(uByte)); |
| if (iStatus) { |
| printk("%s %d command number: %d failed\n", __FUNCTION__, __LINE__, SDIO_CMD5); |
| goto fail; |
| } |
| |
| iStatus = sdioDrv_ExecuteCmd (SD_IO_SEND_RELATIVE_ADDR, 0, MMC_RSP_R6, &uLong, sizeof(uLong)); |
| if (iStatus) { |
| printk("%s %d command number: %d failed\n", __FUNCTION__, __LINE__, SD_IO_SEND_RELATIVE_ADDR); |
| goto fail; |
| } |
| |
| iStatus = sdioDrv_ExecuteCmd (SD_IO_SELECT_CARD, uLong, MMC_RSP_R6, &uByte, sizeof(uByte)); |
| if (iStatus) { |
| printk("%s %d command number: %d failed\n", __FUNCTION__, __LINE__, SD_IO_SELECT_CARD); |
| goto fail; |
| } |
| |
| /* NOTE: |
| * ===== |
| * Each of the following loops is a workaround for a HW bug that will be solved in PG1.1 !! |
| * Each write of CMD-52 to function-0 should use it as follows: |
| * 1) Write the desired byte using CMD-52 |
| * 2) Read back the byte using CMD-52 |
| * 3) Write two dummy bytes to address 0xC8 using CMD-53 |
| * 4) If the byte read in step 2 is different than the written byte repeat the sequence |
| */ |
| |
| /* set device side bus width to 4 bit (for 1 bit write 0x80 instead of 0x82) */ |
| do |
| { |
| uByte = SDIO_BITS_CODE; |
| iStatus = sdioDrv_WriteSyncBytes (TXN_FUNC_ID_CTRL, CCCR_BUS_INTERFACE_CONTOROL, &uByte, 1, 1); |
| if (iStatus) { goto fail; } |
| |
| iStatus = sdioDrv_ReadSyncBytes (TXN_FUNC_ID_CTRL, CCCR_BUS_INTERFACE_CONTOROL, &uByte, 1, 1); |
| if (iStatus) { goto fail; } |
| |
| iStatus = sdioDrv_WriteSync (TXN_FUNC_ID_CTRL, 0xC8, &uLong, 2, 1, 1); |
| if (iStatus) { goto fail; } |
| |
| uCount++; |
| |
| } while ((uByte != SDIO_BITS_CODE) && (uCount < MAX_RETRIES)); |
| |
| uCount = 0; |
| |
| /* allow function 2 */ |
| do |
| { |
| uByte = 4; |
| iStatus = sdioDrv_WriteSyncBytes (TXN_FUNC_ID_CTRL, CCCR_IO_ENABLE, &uByte, 1, 1); |
| if (iStatus) { goto fail; } |
| |
| iStatus = sdioDrv_ReadSyncBytes (TXN_FUNC_ID_CTRL, CCCR_IO_ENABLE, &uByte, 1, 1); |
| if (iStatus) { goto fail; } |
| |
| iStatus = sdioDrv_WriteSync (TXN_FUNC_ID_CTRL, 0xC8, &uLong, 2, 1, 1); |
| if (iStatus) { goto fail; } |
| |
| uCount++; |
| |
| } while ((uByte != 4) && (uCount < MAX_RETRIES)); |
| |
| |
| #ifdef SDIO_IN_BAND_INTERRUPT |
| |
| uCount = 0; |
| |
| do |
| { |
| uByte = 3; |
| iStatus = sdioDrv_WriteSyncBytes (TXN_FUNC_ID_CTRL, CCCR_INT_ENABLE, &uByte, 1, 1); |
| if (iStatus) { goto fail; } |
| |
| iStatus = sdioDrv_ReadSyncBytes (TXN_FUNC_ID_CTRL, CCCR_INT_ENABLE, &uByte, 1, 1); |
| if (iStatus) { goto fail; } |
| |
| iStatus = sdioDrv_WriteSync (TXN_FUNC_ID_CTRL, 0xC8, &uLong, 2, 1, 1); |
| if (iStatus) { goto fail; } |
| |
| uCount++; |
| |
| } while ((uByte != 3) && (uCount < MAX_RETRIES)); |
| |
| |
| #endif |
| |
| uCount = 0; |
| |
| /* set block size for SDIO block mode */ |
| do |
| { |
| uLong = uBlkSize; |
| iStatus = sdioDrv_WriteSync (TXN_FUNC_ID_CTRL, FN0_FBR2_REG_108, &uLong, 2, 1, 1); |
| if (iStatus) { goto fail; } |
| |
| iStatus = sdioDrv_ReadSync (TXN_FUNC_ID_CTRL, FN0_FBR2_REG_108, &uLong, 2, 1, 1); |
| if (iStatus) { goto fail; } |
| |
| iStatus = sdioDrv_WriteSync (TXN_FUNC_ID_CTRL, 0xC8, &uLong, 2, 1, 1); |
| if (iStatus) { goto fail; } |
| |
| uCount++; |
| |
| } while (((uLong & FN0_FBR2_REG_108_BIT_MASK) != uBlkSize) && (uCount < MAX_RETRIES)); |
| |
| if (uCount >= MAX_RETRIES) |
| { |
| /* Failed to write CMD52_WRITE to function 0 */ |
| iStatus = (int)uCount; |
| } |
| |
| fail: |
| /* Disable the clocks for now */ |
| sdioDrv_clk_disable(); |
| |
| return iStatus; |
| } |
| |
| |
| int sdioAdapt_DisconnectBus (void) |
| { |
| if (pDmaBufAddr) |
| { |
| kfree (pDmaBufAddr); |
| pDmaBufAddr = 0; |
| } |
| |
| return sdioDrv_DisconnectBus (); |
| } |
| |
| ETxnStatus sdioAdapt_Transact (unsigned int uFuncId, |
| unsigned int uHwAddr, |
| void * pHostAddr, |
| unsigned int uLength, |
| unsigned int bDirection, |
| unsigned int bBlkMode, |
| unsigned int bFixedAddr, |
| unsigned int bMore) |
| { |
| int iStatus; |
| |
| /* If transction length is below threshold, use Sync methods */ |
| if (uLength < SYNC_ASYNC_LENGTH_THRESH) |
| { |
| /* Call read or write Sync method */ |
| if (bDirection) |
| { |
| CL_TRACE_START_L2(); |
| iStatus = sdioDrv_ReadSync (uFuncId, uHwAddr, pHostAddr, uLength, bFixedAddr, bMore); |
| CL_TRACE_END_L2("tiwlan_drv.ko", "INHERIT", "SDIO", ".ReadSync"); |
| } |
| else |
| { |
| CL_TRACE_START_L2(); |
| iStatus = sdioDrv_WriteSync (uFuncId, uHwAddr, pHostAddr, uLength, bFixedAddr, bMore); |
| CL_TRACE_END_L2("tiwlan_drv.ko", "INHERIT", "SDIO", ".WriteSync"); |
| } |
| |
| /* If failed return ERROR, if succeeded return COMPLETE */ |
| if (iStatus) |
| { |
| return TXN_STATUS_ERROR; |
| } |
| return TXN_STATUS_COMPLETE; |
| } |
| |
| /* If transction length is above threshold, use Async methods */ |
| else |
| { |
| /* Call read or write Async method */ |
| if (bDirection) |
| { |
| CL_TRACE_START_L2(); |
| iStatus = sdioDrv_ReadAsync (uFuncId, uHwAddr, pHostAddr, uLength, bBlkMode, bFixedAddr, bMore); |
| CL_TRACE_END_L2("tiwlan_drv.ko", "INHERIT", "SDIO", ".ReadAsync"); |
| } |
| else |
| { |
| CL_TRACE_START_L2(); |
| iStatus = sdioDrv_WriteAsync (uFuncId, uHwAddr, pHostAddr, uLength, bBlkMode, bFixedAddr, bMore); |
| CL_TRACE_END_L2("tiwlan_drv.ko", "INHERIT", "SDIO", ".WriteAsync"); |
| } |
| |
| /* If failed return ERROR, if succeeded return PENDING */ |
| if (iStatus) |
| { |
| return TXN_STATUS_ERROR; |
| } |
| return TXN_STATUS_PENDING; |
| } |
| } |
| |
| ETxnStatus sdioAdapt_TransactBytes (unsigned int uFuncId, |
| unsigned int uHwAddr, |
| void * pHostAddr, |
| unsigned int uLength, |
| unsigned int bDirection, |
| unsigned int bMore) |
| { |
| static unsigned int lastMore = 0; |
| int iStatus; |
| |
| if ((bMore == 1) || (lastMore == bMore)) |
| { |
| sdioDrv_clk_enable(); |
| } |
| |
| /* Call read or write bytes Sync method */ |
| if (bDirection) |
| { |
| iStatus = sdioDrv_ReadSyncBytes (uFuncId, uHwAddr, pHostAddr, uLength, bMore); |
| } |
| else |
| { |
| iStatus = sdioDrv_WriteSyncBytes (uFuncId, uHwAddr, pHostAddr, uLength, bMore); |
| } |
| |
| if (bMore == 0) |
| { |
| sdioDrv_clk_disable(); |
| } |
| lastMore = bMore; |
| |
| /* If failed return ERROR, if succeeded return COMPLETE */ |
| if (iStatus) |
| { |
| return TXN_STATUS_ERROR; |
| } |
| return TXN_STATUS_COMPLETE; |
| } |
| #endif |
