/***************************************************************************** (c) Cambridge Silicon Radio Limited 2012 All rights reserved and confidential information of CSR Refer to LICENSE.txt included with this source for details on the license terms. *****************************************************************************/ /* * --------------------------------------------------------------------------- * FILE: csr_wifi_hip_card_sdio_mem.c * * PURPOSE: Implementation of the Card API for SDIO. * * --------------------------------------------------------------------------- */ #include "csr_wifi_hip_unifi.h" #include "csr_wifi_hip_card.h" #define SDIO_RETRIES 3 #define CSR_WIFI_HIP_SDIO_TRACE_DATA_LENGTH 16 #define retryable_sdio_error(_csrResult) (((_csrResult) == CSR_SDIO_RESULT_CRC_ERROR) || ((_csrResult) == CSR_SDIO_RESULT_TIMEOUT)) /* * --------------------------------------------------------------------------- * retrying_read8 * retrying_write8 * * These functions provide the first level of retry for SDIO operations. * If an SDIO command fails for reason of a response timeout or CRC * error, it is retried immediately. If three attempts fail we report a * failure. * If the command failed for any other reason, the failure is reported * immediately. * * Arguments: * card Pointer to card structure. * funcnum The SDIO function to access. * Function 0 is the Card Configuration Register space, * function 1/2 is the UniFi register space. * addr Address to access * pdata Pointer in which to return the value read. * data Value to write. * * Returns: * CSR_RESULT_SUCCESS on success, non-zero error code on error: * CSR_WIFI_HIP_RESULT_NO_DEVICE card was ejected * CSR_RESULT_FAILURE an SDIO error occurred * --------------------------------------------------------------------------- */ static CsrResult retrying_read8(card_t *card, s16 funcnum, u32 addr, u8 *pdata) { CsrSdioFunction *sdio = card->sdio_if; CsrResult r = CSR_RESULT_SUCCESS; s16 retries; CsrResult csrResult = CSR_RESULT_SUCCESS; retries = 0; while (retries++ < SDIO_RETRIES) { if (funcnum == 0) { #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_SDIO_TRACE) unifi_debug_log_to_buf("r0@%02X", addr); #endif csrResult = CsrSdioF0Read8(sdio, addr, pdata); } else { #ifdef CSR_WIFI_TRANSPORT_CSPI unifi_error(card->ospriv, "retrying_read_f0_8: F1 8-bit reads are not allowed.\n"); return CSR_RESULT_FAILURE; #else #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_SDIO_TRACE) unifi_debug_log_to_buf("r@%02X", addr); #endif csrResult = CsrSdioRead8(sdio, addr, pdata); #endif } #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_SDIO_TRACE) if (csrResult != CSR_RESULT_SUCCESS) { unifi_debug_log_to_buf("error=%X\n", csrResult); } else { unifi_debug_log_to_buf("=%X\n", *pdata); } #endif if (csrResult == CSR_SDIO_RESULT_NO_DEVICE) { return CSR_WIFI_HIP_RESULT_NO_DEVICE; } /* * Try again for retryable (CRC or TIMEOUT) errors, * break on success or fatal error */ if (!retryable_sdio_error(csrResult)) { #ifdef CSR_WIFI_HIP_DATA_PLANE_PROFILE card->cmd_prof.cmd52_count++; #endif break; } unifi_trace(card->ospriv, UDBG2, "retryable SDIO error reading F%d 0x%lX\n", funcnum, addr); } if ((csrResult == CSR_RESULT_SUCCESS) && (retries > 1)) { unifi_warning(card->ospriv, "Read succeeded after %d attempts\n", retries); } if (csrResult != CSR_RESULT_SUCCESS) { unifi_error(card->ospriv, "Failed to read from UniFi (addr 0x%lX) after %d tries\n", addr, retries - 1); /* Report any SDIO error as a general i/o error */ r = CSR_RESULT_FAILURE; } return r; } /* retrying_read8() */ static CsrResult retrying_write8(card_t *card, s16 funcnum, u32 addr, u8 data) { CsrSdioFunction *sdio = card->sdio_if; CsrResult r = CSR_RESULT_SUCCESS; s16 retries; CsrResult csrResult = CSR_RESULT_SUCCESS; retries = 0; while (retries++ < SDIO_RETRIES) { if (funcnum == 0) { #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_SDIO_TRACE) unifi_debug_log_to_buf("w0@%02X=%X", addr, data); #endif csrResult = CsrSdioF0Write8(sdio, addr, data); } else { #ifdef CSR_WIFI_TRANSPORT_CSPI unifi_error(card->ospriv, "retrying_write_f0_8: F1 8-bit writes are not allowed.\n"); return CSR_RESULT_FAILURE; #else #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_SDIO_TRACE) unifi_debug_log_to_buf("w@%02X=%X", addr, data); #endif csrResult = CsrSdioWrite8(sdio, addr, data); #endif } #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_SDIO_TRACE) if (csrResult != CSR_RESULT_SUCCESS) { unifi_debug_log_to_buf(",error=%X", csrResult); } unifi_debug_string_to_buf("\n"); #endif if (csrResult == CSR_SDIO_RESULT_NO_DEVICE) { return CSR_WIFI_HIP_RESULT_NO_DEVICE; } /* * Try again for retryable (CRC or TIMEOUT) errors, * break on success or fatal error */ if (!retryable_sdio_error(csrResult)) { #ifdef CSR_WIFI_HIP_DATA_PLANE_PROFILE card->cmd_prof.cmd52_count++; #endif break; } unifi_trace(card->ospriv, UDBG2, "retryable SDIO error writing %02X to F%d 0x%lX\n", data, funcnum, addr); } if ((csrResult == CSR_RESULT_SUCCESS) && (retries > 1)) { unifi_warning(card->ospriv, "Write succeeded after %d attempts\n", retries); } if (csrResult != CSR_RESULT_SUCCESS) { unifi_error(card->ospriv, "Failed to write to UniFi (addr 0x%lX) after %d tries\n", addr, retries - 1); /* Report any SDIO error as a general i/o error */ r = CSR_RESULT_FAILURE; } return r; } /* retrying_write8() */ static CsrResult retrying_read16(card_t *card, s16 funcnum, u32 addr, u16 *pdata) { CsrSdioFunction *sdio = card->sdio_if; CsrResult r = CSR_RESULT_SUCCESS; s16 retries; CsrResult csrResult = CSR_RESULT_SUCCESS; retries = 0; while (retries++ < SDIO_RETRIES) { #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_SDIO_TRACE) unifi_debug_log_to_buf("r@%02X", addr); #endif csrResult = CsrSdioRead16(sdio, addr, pdata); #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_SDIO_TRACE) if (csrResult != CSR_RESULT_SUCCESS) { unifi_debug_log_to_buf("error=%X\n", csrResult); } else { unifi_debug_log_to_buf("=%X\n", *pdata); } #endif if (csrResult == CSR_SDIO_RESULT_NO_DEVICE) { return CSR_WIFI_HIP_RESULT_NO_DEVICE; } /* * Try again for retryable (CRC or TIMEOUT) errors, * break on success or fatal error */ if (!retryable_sdio_error(csrResult)) { #ifdef CSR_WIFI_HIP_DATA_PLANE_PROFILE card->cmd_prof.cmd52_count++; #endif break; } unifi_trace(card->ospriv, UDBG2, "retryable SDIO error reading F%d 0x%lX\n", funcnum, addr); } if ((csrResult == CSR_RESULT_SUCCESS) && (retries > 1)) { unifi_warning(card->ospriv, "Read succeeded after %d attempts\n", retries); } if (csrResult != CSR_RESULT_SUCCESS) { unifi_error(card->ospriv, "Failed to read from UniFi (addr 0x%lX) after %d tries\n", addr, retries - 1); /* Report any SDIO error as a general i/o error */ r = CSR_RESULT_FAILURE; } return r; } /* retrying_read16() */ static CsrResult retrying_write16(card_t *card, s16 funcnum, u32 addr, u16 data) { CsrSdioFunction *sdio = card->sdio_if; CsrResult r = CSR_RESULT_SUCCESS; s16 retries; CsrResult csrResult = CSR_RESULT_SUCCESS; retries = 0; while (retries++ < SDIO_RETRIES) { #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_SDIO_TRACE) unifi_debug_log_to_buf("w@%02X=%X", addr, data); #endif csrResult = CsrSdioWrite16(sdio, addr, data); #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_SDIO_TRACE) if (csrResult != CSR_RESULT_SUCCESS) { unifi_debug_log_to_buf(",error=%X", csrResult); } unifi_debug_string_to_buf("\n"); #endif if (csrResult == CSR_SDIO_RESULT_NO_DEVICE) { return CSR_WIFI_HIP_RESULT_NO_DEVICE; } /* * Try again for retryable (CRC or TIMEOUT) errors, * break on success or fatal error */ if (!retryable_sdio_error(csrResult)) { #ifdef CSR_WIFI_HIP_DATA_PLANE_PROFILE card->cmd_prof.cmd52_count++; #endif break; } unifi_trace(card->ospriv, UDBG2, "retryable SDIO error writing %02X to F%d 0x%lX\n", data, funcnum, addr); } if ((csrResult == CSR_RESULT_SUCCESS) && (retries > 1)) { unifi_warning(card->ospriv, "Write succeeded after %d attempts\n", retries); } if (csrResult != CSR_RESULT_SUCCESS) { unifi_error(card->ospriv, "Failed to write to UniFi (addr 0x%lX) after %d tries\n", addr, retries - 1); /* Report any SDIO error as a general i/o error */ r = CSR_RESULT_FAILURE; } return r; } /* retrying_write16() */ /* * --------------------------------------------------------------------------- * sdio_read_f0 * * Reads a byte value from the CCCR (func 0) area of UniFi. * * Arguments: * card Pointer to card structure. * addr Address to read from * pdata Pointer in which to store the read value. * * Returns: * CSR_RESULT_SUCCESS on success, non-zero error code on error: * CSR_WIFI_HIP_RESULT_NO_DEVICE card was ejected * CSR_RESULT_FAILURE an SDIO error occurred * --------------------------------------------------------------------------- */ CsrResult sdio_read_f0(card_t *card, u32 addr, u8 *pdata) { #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_DATA_PLANE_PROFILE) card->cmd_prof.cmd52_f0_r_count++; #endif return retrying_read8(card, 0, addr, pdata); } /* sdio_read_f0() */ /* * --------------------------------------------------------------------------- * sdio_write_f0 * * Writes a byte value to the CCCR (func 0) area of UniFi. * * Arguments: * card Pointer to card structure. * addr Address to read from * data Data value to write. * * Returns: * CSR_RESULT_SUCCESS on success, non-zero error code on error: * CSR_WIFI_HIP_RESULT_NO_DEVICE card was ejected * CSR_RESULT_FAILURE an SDIO error occurred * --------------------------------------------------------------------------- */ CsrResult sdio_write_f0(card_t *card, u32 addr, u8 data) { #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_DATA_PLANE_PROFILE) card->cmd_prof.cmd52_f0_w_count++; #endif return retrying_write8(card, 0, addr, data); } /* sdio_write_f0() */ /* * --------------------------------------------------------------------------- * unifi_read_direct_8_or_16 * * Read a 8-bit value from the UniFi SDIO interface. * * Arguments: * card Pointer to card structure. * addr Address to read from * pdata Pointer in which to return data. * * Returns: * CSR_RESULT_SUCCESS on success, non-zero error code on error: * --------------------------------------------------------------------------- */ CsrResult unifi_read_direct_8_or_16(card_t *card, u32 addr, u8 *pdata) { #ifdef CSR_WIFI_TRANSPORT_CSPI u16 w; CsrResult r; r = retrying_read16(card, card->function, addr, &w); *pdata = (u8)(w & 0xFF); return r; #else return retrying_read8(card, card->function, addr, pdata); #endif } /* unifi_read_direct_8_or_16() */ /* * --------------------------------------------------------------------------- * unifi_write_direct_8_or_16 * * Write a byte value to the UniFi SDIO interface. * * Arguments: * card Pointer to card structure. * addr Address to write to * data Value to write. * * Returns: * CSR_RESULT_SUCCESS on success, non-zero error code on error * * Notes: * If 8-bit write is used, the even address *must* be written second. * This is because writes to odd bytes are cached and not committed * to memory until the preceding even address is written. * --------------------------------------------------------------------------- */ CsrResult unifi_write_direct_8_or_16(card_t *card, u32 addr, u8 data) { if (addr & 1) { unifi_warning(card->ospriv, "Warning: Byte write to an odd address (0x%lX) is dangerous\n", addr); } #ifdef CSR_WIFI_TRANSPORT_CSPI return retrying_write16(card, card->function, addr, (u16)data); #else return retrying_write8(card, card->function, addr, data); #endif } /* unifi_write_direct_8_or_16() */ /* * --------------------------------------------------------------------------- * unifi_read_direct16 * * Read a 16-bit value from the UniFi SDIO interface. * * Arguments: * card Pointer to card structure. * addr Address to read from * pdata Pointer in which to return data. * * Returns: * CSR_RESULT_SUCCESS on success, non-zero error code on error: * CSR_WIFI_HIP_RESULT_NO_DEVICE card was ejected * CSR_RESULT_FAILURE an SDIO error occurred * * Notes: * The even address *must* be read first. This is because reads from * odd bytes are cached and read from memory when the preceding * even address is read. * --------------------------------------------------------------------------- */ CsrResult unifi_read_direct16(card_t *card, u32 addr, u16 *pdata) { return retrying_read16(card, card->function, addr, pdata); } /* unifi_read_direct16() */ /* * --------------------------------------------------------------------------- * unifi_write_direct16 * * Write a 16-bit value to the UniFi SDIO interface. * * Arguments: * card Pointer to card structure. * addr Address to write to * data Value to write. * * Returns: * CSR_RESULT_SUCCESS on success, non-zero error code on error: * CSR_WIFI_HIP_RESULT_NO_DEVICE card was ejected * CSR_RESULT_FAILURE an SDIO error occurred * * Notes: * The even address *must* be written second. This is because writes to * odd bytes are cached and not committed to memory until the preceding * even address is written. * --------------------------------------------------------------------------- */ CsrResult unifi_write_direct16(card_t *card, u32 addr, u16 data) { return retrying_write16(card, card->function, addr, data); } /* unifi_write_direct16() */ /* * --------------------------------------------------------------------------- * unifi_read_direct32 * * Read a 32-bit value from the UniFi SDIO interface. * * Arguments: * card Pointer to card structure. * addr Address to read from * pdata Pointer in which to return data. * * Returns: * CSR_RESULT_SUCCESS on success, non-zero error code on error: * CSR_WIFI_HIP_RESULT_NO_DEVICE card was ejected * CSR_RESULT_FAILURE an SDIO error occurred * --------------------------------------------------------------------------- */ CsrResult unifi_read_direct32(card_t *card, u32 addr, u32 *pdata) { CsrResult r; u16 w0, w1; r = retrying_read16(card, card->function, addr, &w0); if (r != CSR_RESULT_SUCCESS) { return r; } r = retrying_read16(card, card->function, addr + 2, &w1); if (r != CSR_RESULT_SUCCESS) { return r; } *pdata = ((u32)w1 << 16) | (u32)w0; return CSR_RESULT_SUCCESS; } /* unifi_read_direct32() */ /* * --------------------------------------------------------------------------- * unifi_read_directn_match * * Read multiple 8-bit values from the UniFi SDIO interface, * stopping when either we have read 'len' bytes or we have read * a octet equal to 'match'. If 'match' is not a valid octet * then this function is the same as 'unifi_read_directn'. * * Arguments: * card Pointer to card structure. * addr Start address to read from. * pdata Pointer to which to write data. * len Maximum umber of bytes to read * match The value to stop reading at. * num Pointer to buffer to write number of bytes read * * Returns: * number of octets read on success, negative error code on error: * CSR_WIFI_HIP_RESULT_NO_DEVICE card was ejected * CSR_RESULT_FAILURE an SDIO error occurred * * Notes: * The even address *must* be read first. This is because reads from * odd bytes are cached and read from memory when the preceding * even address is read. * --------------------------------------------------------------------------- */ static CsrResult unifi_read_directn_match(card_t *card, u32 addr, void *pdata, u16 len, s8 m, u32 *num) { CsrResult r; u32 i; u8 *cptr; u16 w; *num = 0; cptr = (u8 *)pdata; for (i = 0; i < len; i += 2) { r = retrying_read16(card, card->function, addr, &w); if (r != CSR_RESULT_SUCCESS) { return r; } *cptr++ = ((u8)w & 0xFF); if ((m >= 0) && (((s8)w & 0xFF) == m)) { break; } if (i + 1 == len) { /* The len is odd. Ignore the last high byte */ break; } *cptr++ = ((u8)(w >> 8) & 0xFF); if ((m >= 0) && (((s8)(w >> 8) & 0xFF) == m)) { break; } addr += 2; } *num = (s32)(cptr - (u8 *)pdata); return CSR_RESULT_SUCCESS; } /* * --------------------------------------------------------------------------- * unifi_read_directn * * Read multiple 8-bit values from the UniFi SDIO interface. * * Arguments: * card Pointer to card structure. * addr Start address to read from. * pdata Pointer to which to write data. * len Number of bytes to read * * Returns: * 0 on success, non-zero error code on error: * CSR_WIFI_HIP_RESULT_NO_DEVICE card was ejected * CSR_RESULT_FAILURE an SDIO error occurred * * Notes: * The even address *must* be read first. This is because reads from * odd bytes are cached and read from memory when the preceding * even address is read. * --------------------------------------------------------------------------- */ CsrResult unifi_read_directn(card_t *card, u32 addr, void *pdata, u16 len) { u32 num; return unifi_read_directn_match(card, addr, pdata, len, -1, &num); } /* unifi_read_directn() */ /* * --------------------------------------------------------------------------- * unifi_write_directn * * Write multiple 8-bit values to the UniFi SDIO interface. * * Arguments: * card Pointer to card structure. * addr Start address to write to. * pdata Source data pointer. * len Number of bytes to write, must be even. * * Returns: * 0 on success, non-zero error code on error: * CSR_WIFI_HIP_RESULT_NO_DEVICE card was ejected * CSR_RESULT_FAILURE an SDIO error occurred * * Notes: * The UniFi has a peculiar 16-bit bus architecture. Writes are only * committed to memory when an even address is accessed. Writes to * odd addresses are cached and only committed if the next write is * to the preceding address. * This means we must write data as pairs of bytes in reverse order. * --------------------------------------------------------------------------- */ CsrResult unifi_write_directn(card_t *card, u32 addr, void *pdata, u16 len) { CsrResult r; u8 *cptr; s16 signed_len; cptr = (u8 *)pdata; signed_len = (s16)len; while (signed_len > 0) { /* This is UniFi-1 specific code. CSPI not supported so 8-bit write allowed */ r = retrying_write16(card, card->function, addr, *cptr); if (r != CSR_RESULT_SUCCESS) { return r; } cptr += 2; addr += 2; signed_len -= 2; } return CSR_RESULT_SUCCESS; } /* unifi_write_directn() */ /* * --------------------------------------------------------------------------- * set_dmem_page * set_pmem_page * * Set up the page register for the shared data memory window or program * memory window. * * Arguments: * card Pointer to card structure. * dmem_addr UniFi shared-data-memory address to access. * pmem_addr UniFi program memory address to access. This includes * External FLASH memory at 0x000000 * Processor program memory at 0x200000 * External SRAM at memory 0x400000 * paddr Location to write an SDIO address (24-bit) for * use in a unifi_read_direct or unifi_write_direct call. * * Returns: * CSR_RESULT_SUCCESS on success * CSR_WIFI_HIP_RESULT_NO_DEVICE card was ejected * CSR_RESULT_FAILURE an SDIO error occurred * --------------------------------------------------------------------------- */ static CsrResult set_dmem_page(card_t *card, u32 dmem_addr, u32 *paddr) { u16 page, addr; u32 len; CsrResult r; *paddr = 0; if (!ChipHelper_DecodeWindow(card->helper, CHIP_HELPER_WINDOW_3, CHIP_HELPER_WT_SHARED, dmem_addr / 2, &page, &addr, &len)) { unifi_error(card->ospriv, "Failed to decode SHARED_DMEM_PAGE %08lx\n", dmem_addr); return CSR_WIFI_HIP_RESULT_INVALID_VALUE; } if (page != card->dmem_page) { unifi_trace(card->ospriv, UDBG6, "setting dmem page=0x%X, addr=0x%lX\n", page, addr); /* change page register */ r = unifi_write_direct16(card, ChipHelper_HOST_WINDOW3_PAGE(card->helper) * 2, page); if (r != CSR_RESULT_SUCCESS) { unifi_error(card->ospriv, "Failed to write SHARED_DMEM_PAGE\n"); return r; } card->dmem_page = page; } *paddr = ((s32)addr * 2) + (dmem_addr & 1); return CSR_RESULT_SUCCESS; } /* set_dmem_page() */ static CsrResult set_pmem_page(card_t *card, u32 pmem_addr, enum chip_helper_window_type mem_type, u32 *paddr) { u16 page, addr; u32 len; CsrResult r; *paddr = 0; if (!ChipHelper_DecodeWindow(card->helper, CHIP_HELPER_WINDOW_2, mem_type, pmem_addr / 2, &page, &addr, &len)) { unifi_error(card->ospriv, "Failed to decode PROG MEM PAGE %08lx %d\n", pmem_addr, mem_type); return CSR_WIFI_HIP_RESULT_INVALID_VALUE; } if (page != card->pmem_page) { unifi_trace(card->ospriv, UDBG6, "setting pmem page=0x%X, addr=0x%lX\n", page, addr); /* change page register */ r = unifi_write_direct16(card, ChipHelper_HOST_WINDOW2_PAGE(card->helper) * 2, page); if (r != CSR_RESULT_SUCCESS) { unifi_error(card->ospriv, "Failed to write PROG MEM PAGE\n"); return r; } card->pmem_page = page; } *paddr = ((s32)addr * 2) + (pmem_addr & 1); return CSR_RESULT_SUCCESS; } /* set_pmem_page() */ /* * --------------------------------------------------------------------------- * set_page * * Sets up the appropriate page register to access the given address. * Returns the sdio address at which the unifi address can be accessed. * * Arguments: * card Pointer to card structure. * generic_addr UniFi internal address to access, in Generic Pointer * format, i.e. top byte is space indicator. * paddr Location to write page address * SDIO address (24-bit) for use in a unifi_read_direct or * unifi_write_direct call * * Returns: * CSR_WIFI_HIP_RESULT_NO_DEVICE card was ejected * CSR_RESULT_FAILURE an SDIO error occurred * CSR_WIFI_HIP_RESULT_INVALID_VALUE the address is invalid * --------------------------------------------------------------------------- */ static CsrResult set_page(card_t *card, u32 generic_addr, u32 *paddr) { s32 space; u32 addr; CsrResult r = CSR_RESULT_SUCCESS; if (!paddr) { return CSR_WIFI_HIP_RESULT_INVALID_VALUE; } *paddr = 0; space = UNIFI_GP_SPACE(generic_addr); addr = UNIFI_GP_OFFSET(generic_addr); switch (space) { case UNIFI_SH_DMEM: /* Shared Data Memory is accessed via the Shared Data Memory window */ r = set_dmem_page(card, addr, paddr); if (r != CSR_RESULT_SUCCESS) { return r; } break; case UNIFI_EXT_FLASH: if (!ChipHelper_HasFlash(card->helper)) { unifi_error(card->ospriv, "Bad address space for chip in generic pointer 0x%08lX (helper=0x%x)\n", generic_addr, card->helper); return CSR_WIFI_HIP_RESULT_INVALID_VALUE; } /* External FLASH is accessed via the Program Memory window */ r = set_pmem_page(card, addr, CHIP_HELPER_WT_FLASH, paddr); break; case UNIFI_EXT_SRAM: if (!ChipHelper_HasExtSram(card->helper)) { unifi_error(card->ospriv, "Bad address space for chip in generic pointer 0x%08l (helper=0x%x)\n", generic_addr, card->helper); return CSR_WIFI_HIP_RESULT_INVALID_VALUE; } /* External SRAM is accessed via the Program Memory window */ r = set_pmem_page(card, addr, CHIP_HELPER_WT_EXT_SRAM, paddr); break; case UNIFI_REGISTERS: /* Registers are accessed directly */ *paddr = addr; break; case UNIFI_PHY_DMEM: r = unifi_set_proc_select(card, UNIFI_PROC_PHY); if (r != CSR_RESULT_SUCCESS) { return r; } *paddr = ChipHelper_DATA_MEMORY_RAM_OFFSET(card->helper) * 2 + addr; break; case UNIFI_MAC_DMEM: r = unifi_set_proc_select(card, UNIFI_PROC_MAC); if (r != CSR_RESULT_SUCCESS) { return r; } *paddr = ChipHelper_DATA_MEMORY_RAM_OFFSET(card->helper) * 2 + addr; break; case UNIFI_BT_DMEM: if (!ChipHelper_HasBt(card->helper)) { unifi_error(card->ospriv, "Bad address space for chip in generic pointer 0x%08lX (helper=0x%x)\n", generic_addr, card->helper); return CSR_WIFI_HIP_RESULT_INVALID_VALUE; } r = unifi_set_proc_select(card, UNIFI_PROC_BT); if (r != CSR_RESULT_SUCCESS) { return r; } *paddr = ChipHelper_DATA_MEMORY_RAM_OFFSET(card->helper) * 2 + addr; break; case UNIFI_PHY_PMEM: r = unifi_set_proc_select(card, UNIFI_PROC_PHY); if (r != CSR_RESULT_SUCCESS) { return r; } r = set_pmem_page(card, addr, CHIP_HELPER_WT_CODE_RAM, paddr); break; case UNIFI_MAC_PMEM: r = unifi_set_proc_select(card, UNIFI_PROC_MAC); if (r != CSR_RESULT_SUCCESS) { return r; } r = set_pmem_page(card, addr, CHIP_HELPER_WT_CODE_RAM, paddr); break; case UNIFI_BT_PMEM: if (!ChipHelper_HasBt(card->helper)) { unifi_error(card->ospriv, "Bad address space for chip in generic pointer 0x%08lX (helper=0x%x)\n", generic_addr, card->helper); return CSR_WIFI_HIP_RESULT_INVALID_VALUE; } r = unifi_set_proc_select(card, UNIFI_PROC_BT); if (r != CSR_RESULT_SUCCESS) { return r; } r = set_pmem_page(card, addr, CHIP_HELPER_WT_CODE_RAM, paddr); break; case UNIFI_PHY_ROM: if (!ChipHelper_HasRom(card->helper)) { unifi_error(card->ospriv, "Bad address space for chip in generic pointer 0x%08lX (helper=0x%x)\n", generic_addr, card->helper); return CSR_WIFI_HIP_RESULT_INVALID_VALUE; } r = unifi_set_proc_select(card, UNIFI_PROC_PHY); if (r != CSR_RESULT_SUCCESS) { return r; } r = set_pmem_page(card, addr, CHIP_HELPER_WT_ROM, paddr); break; case UNIFI_MAC_ROM: if (!ChipHelper_HasRom(card->helper)) { unifi_error(card->ospriv, "Bad address space for chip in generic pointer 0x%08lX (helper=0x%x)\n", generic_addr, card->helper); return CSR_WIFI_HIP_RESULT_INVALID_VALUE; } r = unifi_set_proc_select(card, UNIFI_PROC_MAC); if (r != CSR_RESULT_SUCCESS) { return r; } r = set_pmem_page(card, addr, CHIP_HELPER_WT_ROM, paddr); break; case UNIFI_BT_ROM: if (!ChipHelper_HasRom(card->helper) || !ChipHelper_HasBt(card->helper)) { unifi_error(card->ospriv, "Bad address space for chip in generic pointer 0x%08lX (helper=0x%x)\n", generic_addr, card->helper); return CSR_WIFI_HIP_RESULT_INVALID_VALUE; } r = unifi_set_proc_select(card, UNIFI_PROC_BT); if (r != CSR_RESULT_SUCCESS) { return r; } r = set_pmem_page(card, addr, CHIP_HELPER_WT_ROM, paddr); break; default: unifi_error(card->ospriv, "Bad address space %d in generic pointer 0x%08lX (helper=0x%x)\n", space, generic_addr, card->helper); return CSR_WIFI_HIP_RESULT_INVALID_VALUE; } return r; } /* set_page() */ /* * --------------------------------------------------------------------------- * unifi_set_proc_select * * * Arguments: * card Pointer to card structure. * select Which XAP core to select * * Returns: * 0 on success, non-zero error code on error: * CSR_WIFI_HIP_RESULT_NO_DEVICE card was ejected * CSR_RESULT_FAILURE an SDIO error occurred * --------------------------------------------------------------------------- */ CsrResult unifi_set_proc_select(card_t *card, enum unifi_dbg_processors_select select) { CsrResult r; /* Verify the the select value is allowed. */ switch (select) { case UNIFI_PROC_MAC: case UNIFI_PROC_PHY: case UNIFI_PROC_BOTH: break; default: return CSR_WIFI_HIP_RESULT_INVALID_VALUE; } if (card->proc_select != (u32)select) { r = unifi_write_direct16(card, ChipHelper_DBG_HOST_PROC_SELECT(card->helper) * 2, (u8)select); if (r == CSR_WIFI_HIP_RESULT_NO_DEVICE) { return r; } if (r != CSR_RESULT_SUCCESS) { unifi_error(card->ospriv, "Failed to write to Proc Select register\n"); return r; } card->proc_select = (u32)select; } return CSR_RESULT_SUCCESS; } /* * --------------------------------------------------------------------------- * unifi_read_8_or_16 * * Performs a byte read of the given address in shared data memory. * Set up the shared data memory page register as required. * * Arguments: * card Pointer to card structure. * unifi_addr UniFi shared-data-memory address to access. * pdata Pointer to a byte variable for the value read. * * Returns: * CSR_RESULT_SUCCESS on success, non-zero error code on error: * CSR_WIFI_HIP_RESULT_NO_DEVICE card was ejected * CSR_RESULT_FAILURE an SDIO error occurred * CSR_WIFI_HIP_RESULT_INVALID_VALUE a bad generic pointer was specified * --------------------------------------------------------------------------- */ CsrResult unifi_read_8_or_16(card_t *card, u32 unifi_addr, u8 *pdata) { u32 sdio_addr; CsrResult r; #ifdef CSR_WIFI_TRANSPORT_CSPI u16 w; #endif r = set_page(card, unifi_addr, &sdio_addr); if (r != CSR_RESULT_SUCCESS) { return r; } #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_DATA_PLANE_PROFILE) card->cmd_prof.cmd52_r8or16_count++; #endif #ifdef CSR_WIFI_TRANSPORT_CSPI r = retrying_read16(card, card->function, sdio_addr, &w); *pdata = (u8)(w & 0xFF); return r; #else return retrying_read8(card, card->function, sdio_addr, pdata); #endif } /* unifi_read_8_or_16() */ /* * --------------------------------------------------------------------------- * unifi_write_8_or_16 * * Performs a byte write of the given address in shared data memory. * Set up the shared data memory page register as required. * * Arguments: * card Pointer to card context struct. * unifi_addr UniFi shared-data-memory address to access. * data Value to write. * * Returns: * CSR_RESULT_SUCCESS on success, non-zero error code on error: * CSR_WIFI_HIP_RESULT_NO_DEVICE card was ejected * CSR_RESULT_FAILURE an SDIO error occurred * CSR_WIFI_HIP_RESULT_INVALID_VALUE a bad generic pointer was specified * * Notes: * Beware using unifi_write8() because byte writes are not safe on UniFi. * Writes to odd bytes are cached, writes to even bytes perform a 16-bit * write with the previously cached odd byte. * --------------------------------------------------------------------------- */ CsrResult unifi_write_8_or_16(card_t *card, u32 unifi_addr, u8 data) { u32 sdio_addr; CsrResult r; #ifdef CSR_WIFI_TRANSPORT_CSPI u16 w; #endif r = set_page(card, unifi_addr, &sdio_addr); if (r != CSR_RESULT_SUCCESS) { return r; } if (sdio_addr & 1) { unifi_warning(card->ospriv, "Warning: Byte write to an odd address (0x%lX) is dangerous\n", sdio_addr); } #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_DATA_PLANE_PROFILE) card->cmd_prof.cmd52_w8or16_count++; #endif #ifdef CSR_WIFI_TRANSPORT_CSPI w = data; return retrying_write16(card, card->function, sdio_addr, w); #else return retrying_write8(card, card->function, sdio_addr, data); #endif } /* unifi_write_8_or_16() */ /* * --------------------------------------------------------------------------- * unifi_card_read16 * * Performs a 16-bit read of the given address in shared data memory. * Set up the shared data memory page register as required. * * Arguments: * card Pointer to card structure. * unifi_addr UniFi shared-data-memory address to access. * pdata Pointer to a 16-bit int variable for the value read. * * Returns: * CSR_RESULT_SUCCESS on success, non-zero error code on error: * CSR_WIFI_HIP_RESULT_NO_DEVICE card was ejected * CSR_RESULT_FAILURE an SDIO error occurred * CSR_WIFI_HIP_RESULT_INVALID_VALUE a bad generic pointer was specified * --------------------------------------------------------------------------- */ CsrResult unifi_card_read16(card_t *card, u32 unifi_addr, u16 *pdata) { u32 sdio_addr; CsrResult r; r = set_page(card, unifi_addr, &sdio_addr); if (r != CSR_RESULT_SUCCESS) { return r; } #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_DATA_PLANE_PROFILE) card->cmd_prof.cmd52_r16_count++; #endif return unifi_read_direct16(card, sdio_addr, pdata); } /* unifi_card_read16() */ /* * --------------------------------------------------------------------------- * unifi_card_write16 * * Performs a 16-bit write of the given address in shared data memory. * Set up the shared data memory page register as required. * * Arguments: * card Pointer to card structure. * unifi_addr UniFi shared-data-memory address to access. * pdata Pointer to a byte variable for the value write. * * Returns: * CSR_RESULT_SUCCESS on success, non-zero error code on error: * CSR_WIFI_HIP_RESULT_NO_DEVICE card was ejected * CSR_RESULT_FAILURE an SDIO error occurred * CSR_WIFI_HIP_RESULT_INVALID_VALUE a bad generic pointer was specified * --------------------------------------------------------------------------- */ CsrResult unifi_card_write16(card_t *card, u32 unifi_addr, u16 data) { u32 sdio_addr; CsrResult r; r = set_page(card, unifi_addr, &sdio_addr); if (r != CSR_RESULT_SUCCESS) { return r; } #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_DATA_PLANE_PROFILE) card->cmd_prof.cmd52_w16_count++; #endif return unifi_write_direct16(card, sdio_addr, data); } /* unifi_card_write16() */ /* * --------------------------------------------------------------------------- * unifi_read32 * * Performs a 32-bit read of the given address in shared data memory. * Set up the shared data memory page register as required. * * Arguments: * card Pointer to card structure. * unifi_addr UniFi shared-data-memory address to access. * pdata Pointer to a int variable for the value read. * * Returns: * CSR_RESULT_SUCCESS on success, non-zero error code on error: * CSR_WIFI_HIP_RESULT_NO_DEVICE card was ejected * CSR_RESULT_FAILURE an SDIO error occurred * CSR_WIFI_HIP_RESULT_INVALID_VALUE a bad generic pointer was specified * --------------------------------------------------------------------------- */ CsrResult unifi_read32(card_t *card, u32 unifi_addr, u32 *pdata) { u32 sdio_addr; CsrResult r; r = set_page(card, unifi_addr, &sdio_addr); if (r != CSR_RESULT_SUCCESS) { return r; } #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_DATA_PLANE_PROFILE) card->cmd_prof.cmd52_r32_count++; #endif return unifi_read_direct32(card, sdio_addr, pdata); } /* unifi_read32() */ /* * --------------------------------------------------------------------------- * unifi_card_readn * unifi_readnz * * Read multiple 8-bit values from the UniFi SDIO interface. * This function interprets the address as a GenericPointer as * defined in the UniFi Host Interface Protocol Specification. * The readnz version of this function will stop when it reads a * zero octet. * * Arguments: * card Pointer to card structure. * unifi_addr UniFi shared-data-memory address to access. * pdata Pointer to which to write data. * len Number of bytes to read * * Returns: * CSR_RESULT_SUCCESS on success, non-zero error code on error: * CSR_WIFI_HIP_RESULT_NO_DEVICE card was ejected * CSR_RESULT_FAILURE an SDIO error occurred * CSR_WIFI_HIP_RESULT_INVALID_VALUE a bad generic pointer was specified * --------------------------------------------------------------------------- */ CsrResult unifi_readn_match(card_t *card, u32 unifi_addr, void *pdata, u16 len, s8 match) { u32 sdio_addr; CsrResult r; u32 num; r = set_page(card, unifi_addr, &sdio_addr); if (r != CSR_RESULT_SUCCESS) { return r; } r = unifi_read_directn_match(card, sdio_addr, pdata, len, match, &num); return r; } /* unifi_readn_match() */ CsrResult unifi_card_readn(card_t *card, u32 unifi_addr, void *pdata, u16 len) { return unifi_readn_match(card, unifi_addr, pdata, len, -1); } /* unifi_card_readn() */ CsrResult unifi_readnz(card_t *card, u32 unifi_addr, void *pdata, u16 len) { return unifi_readn_match(card, unifi_addr, pdata, len, 0); } /* unifi_readnz() */ /* * --------------------------------------------------------------------------- * unifi_read_shared_count * * Read signal count locations, checking for an SDIO error. The * signal count locations only contain a valid number if the * highest bit isn't set. * * Arguments: * card Pointer to card context structure. * addr Shared-memory address to read. * * Returns: * Value read from memory (0-127) or -1 on error * --------------------------------------------------------------------------- */ s32 unifi_read_shared_count(card_t *card, u32 addr) { u8 b; /* I've increased this count, because I have seen cases where * there were three reads in a row with the top bit set. I'm not * sure why this might have happened, but I can't see a problem * with increasing this limit. It's better to take a while to * recover than to fail. */ #define SHARED_READ_RETRY_LIMIT 10 s32 i; /* * Get the to-host-signals-written count. * The top-bit will be set if the firmware was in the process of * changing the value, in which case we read again. */ /* Limit the number of repeats so we don't freeze */ for (i = 0; i < SHARED_READ_RETRY_LIMIT; i++) { CsrResult r; r = unifi_read_8_or_16(card, addr, &b); if (r != CSR_RESULT_SUCCESS) { return -1; } if (!(b & 0x80)) { /* There is a chance that the MSB may have contained invalid data * (overflow) at the time it was read. Therefore mask off the MSB. * This avoids a race between driver read and firmware write of the * word, the value we need is in the lower 8 bits anway. */ return (s32)(b & 0xff); } } return -1; /* this function has changed in WMM mods */ } /* unifi_read_shared_count() */ /* * --------------------------------------------------------------------------- * unifi_writen * * Write multiple 8-bit values to the UniFi SDIO interface using CMD52 * This function interprets the address as a GenericPointer as * defined in the UniFi Host Interface Protocol Specification. * * Arguments: * card Pointer to card structure. * unifi_addr UniFi shared-data-memory address to access. * pdata Pointer to which to write data. * len Number of bytes to write * * Returns: * 0 on success, non-zero error code on error: * CSR_WIFI_HIP_RESULT_NO_DEVICE card was ejected * CSR_RESULT_FAILURE an SDIO error occurred * CSR_WIFI_HIP_RESULT_INVALID_VALUE an odd length or length too big. * --------------------------------------------------------------------------- */ CsrResult unifi_writen(card_t *card, u32 unifi_addr, void *pdata, u16 len) { u32 sdio_addr; CsrResult r; r = set_page(card, unifi_addr, &sdio_addr); if (r != CSR_RESULT_SUCCESS) { return r; } return unifi_write_directn(card, sdio_addr, pdata, len); } /* unifi_writen() */ static CsrResult csr_sdio_block_rw(card_t *card, s16 funcnum, u32 addr, u8 *pdata, u16 count, s16 dir_is_write) { CsrResult csrResult; if (dir_is_write == UNIFI_SDIO_READ) { #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_SDIO_TRACE) unifi_debug_log_to_buf("r@%02X#%X=", addr, count); #endif #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_DATA_PLANE_PROFILE) unifi_debug_log_to_buf("R"); #endif csrResult = CsrSdioRead(card->sdio_if, addr, pdata, count); #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_DATA_PLANE_PROFILE) unifi_debug_log_to_buf("<"); #endif } else { #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_SDIO_TRACE) unifi_debug_log_to_buf("w@%02X#%X=", addr, count); unifi_debug_hex_to_buf(pdata, count > CSR_WIFI_HIP_SDIO_TRACE_DATA_LENGTH?CSR_WIFI_HIP_SDIO_TRACE_DATA_LENGTH : count); #endif #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_DATA_PLANE_PROFILE) unifi_debug_log_to_buf("W"); #endif csrResult = CsrSdioWrite(card->sdio_if, addr, pdata, count); #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_DATA_PLANE_PROFILE) unifi_debug_log_to_buf(">"); #endif } #ifdef CSR_WIFI_HIP_DATA_PLANE_PROFILE card->cmd_prof.cmd53_count++; #endif #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_SDIO_TRACE) if (csrResult != CSR_RESULT_SUCCESS) { unifi_debug_log_to_buf("error=%X", csrResult); } else if (dir_is_write == UNIFI_SDIO_READ) { unifi_debug_hex_to_buf(pdata, count > CSR_WIFI_HIP_SDIO_TRACE_DATA_LENGTH?CSR_WIFI_HIP_SDIO_TRACE_DATA_LENGTH : count); } unifi_debug_string_to_buf("\n"); #endif return csrResult; /* CSR SDIO (not HIP) error code */ } /* * --------------------------------------------------------------------------- * unifi_bulk_rw * * Transfer bulk data to or from the UniFi SDIO interface. * This function is used to read or write signals and bulk data. * * Arguments: * card Pointer to card structure. * handle Value to put in the Register Address field of the CMD53 req. * data Pointer to data to write. * direction One of UNIFI_SDIO_READ or UNIFI_SDIO_WRITE * * Returns: * CSR_RESULT_SUCCESS on success, non-zero error code on error: * CSR_WIFI_HIP_RESULT_NO_DEVICE card was ejected * CSR_RESULT_FAILURE an SDIO error occurred * * Notes: * This function uses SDIO CMD53, which is the block transfer mode. * --------------------------------------------------------------------------- */ CsrResult unifi_bulk_rw(card_t *card, u32 handle, void *pdata, u32 len, s16 direction) { #define CMD53_RETRIES 3 /* * Ideally instead of sleeping, we want to busy wait. * Currently there is no framework API to do this. When it becomes available, * we can use it to busy wait using usecs */ #define REWIND_RETRIES 15 /* when REWIND_DELAY==1msec, or 250 when REWIND_DELAY==50usecs */ #define REWIND_POLLING_RETRIES 5 #define REWIND_DELAY 1 /* msec or 50usecs */ CsrResult csrResult; /* SDIO error code */ CsrResult r = CSR_RESULT_SUCCESS; /* HIP error code */ s16 retries = CMD53_RETRIES; s16 stat_retries; u8 stat; s16 dump_read; #ifdef UNIFI_DEBUG u8 *pdata_lsb = ((u8 *)&pdata) + card->lsb; #endif #ifdef CSR_WIFI_MAKE_FAKE_CMD53_ERRORS static s16 fake_error; #endif dump_read = 0; #ifdef UNIFI_DEBUG if (*pdata_lsb & 1) { unifi_notice(card->ospriv, "CD53 request on a unaligned buffer (addr: 0x%X) dir %s-Host\n", pdata, (direction == UNIFI_SDIO_READ)?"To" : "From"); if (direction == UNIFI_SDIO_WRITE) { dump(pdata, (u16)len); } else { dump_read = 1; } } #endif /* Defensive checks */ if (!pdata) { unifi_error(card->ospriv, "Null pdata for unifi_bulk_rw() len: %d\n", len); return CSR_WIFI_HIP_RESULT_INVALID_VALUE; } if ((len & 1) || (len > 0xffff)) { unifi_error(card->ospriv, "Impossible CMD53 length requested: %d\n", len); return CSR_WIFI_HIP_RESULT_INVALID_VALUE; } while (1) { csrResult = csr_sdio_block_rw(card, card->function, handle, (u8 *)pdata, (u16)len, direction); if (csrResult == CSR_SDIO_RESULT_NO_DEVICE) { return CSR_WIFI_HIP_RESULT_NO_DEVICE; } #ifdef CSR_WIFI_MAKE_FAKE_CMD53_ERRORS if (++fake_error > 100) { fake_error = 90; unifi_warning(card->ospriv, "Faking a CMD53 error,\n"); if (csrResult == CSR_RESULT_SUCCESS) { csrResult = CSR_RESULT_FAILURE; } } #endif if (csrResult == CSR_RESULT_SUCCESS) { if (dump_read) { dump(pdata, (u16)len); } break; } /* * At this point the SDIO driver should have written the I/O Abort * register to notify UniFi that the command has failed. * UniFi-1 and UniFi-2 (not UF6xxx) use the same register to store the * Deep Sleep State. This means we have to restore the Deep Sleep * State (AWAKE in any case since we can not perform a CD53 in any other * state) by rewriting the I/O Abort register to its previous value. */ if (card->chip_id <= SDIO_CARD_ID_UNIFI_2) { (void)unifi_set_host_state(card, UNIFI_HOST_STATE_AWAKE); } /* If csr_sdio_block_rw() failed in a non-retryable way, or retries exhausted * then stop retrying */ if (!retryable_sdio_error(csrResult)) { unifi_error(card->ospriv, "Fatal error in a CMD53 transfer\n"); break; } /* * These happen from time to time, try again */ if (--retries == 0) { break; } unifi_trace(card->ospriv, UDBG4, "Error in a CMD53 transfer, retrying (h:%d,l:%u)...\n", (s16)handle & 0xff, len); /* The transfer failed, rewind and try again */ r = unifi_write_8_or_16(card, card->sdio_ctrl_addr + 8, (u8)(handle & 0xff)); if (r == CSR_WIFI_HIP_RESULT_NO_DEVICE) { return r; } if (r != CSR_RESULT_SUCCESS) { /* * If we can't even do CMD52 (register read/write) then * stop here. */ unifi_error(card->ospriv, "Failed to write REWIND cmd\n"); return r; } /* Signal the UniFi to look for the rewind request. */ r = CardGenInt(card); if (r != CSR_RESULT_SUCCESS) { return r; } /* Wait for UniFi to acknowledge the rewind */ stat_retries = REWIND_RETRIES; while (1) { r = unifi_read_8_or_16(card, card->sdio_ctrl_addr + 8, &stat); if (r == CSR_WIFI_HIP_RESULT_NO_DEVICE) { return r; } if (r != CSR_RESULT_SUCCESS) { unifi_error(card->ospriv, "Failed to read REWIND status\n"); return CSR_RESULT_FAILURE; } if (stat == 0) { break; } if (--stat_retries == 0) { unifi_error(card->ospriv, "Timeout waiting for REWIND ready\n"); return CSR_RESULT_FAILURE; } /* Poll for the ack a few times */ if (stat_retries < REWIND_RETRIES - REWIND_POLLING_RETRIES) { CsrThreadSleep(REWIND_DELAY); } } } /* The call to csr_sdio_block_rw() still failed after retrying */ if (csrResult != CSR_RESULT_SUCCESS) { unifi_error(card->ospriv, "Block %s failed after %d retries\n", (direction == UNIFI_SDIO_READ)?"read" : "write", CMD53_RETRIES - retries); /* Report any SDIO error as a general i/o error */ return CSR_RESULT_FAILURE; } /* Collect some stats */ if (direction == UNIFI_SDIO_READ) { card->sdio_bytes_read += len; } else { card->sdio_bytes_written += len; } return CSR_RESULT_SUCCESS; } /* unifi_bulk_rw() */ /* * --------------------------------------------------------------------------- * unifi_bulk_rw_noretry * * Transfer bulk data to or from the UniFi SDIO interface. * This function is used to read or write signals and bulk data. * * Arguments: * card Pointer to card structure. * handle Value to put in the Register Address field of * the CMD53 req. * data Pointer to data to write. * direction One of UNIFI_SDIO_READ or UNIFI_SDIO_WRITE * * Returns: * 0 on success, non-zero error code on error: * CSR_WIFI_HIP_RESULT_NO_DEVICE card was ejected * CSR_RESULT_FAILURE an SDIO error occurred * * Notes: * This function uses SDIO CMD53, which is the block transfer mode. * --------------------------------------------------------------------------- */ CsrResult unifi_bulk_rw_noretry(card_t *card, u32 handle, void *pdata, u32 len, s16 direction) { CsrResult csrResult; csrResult = csr_sdio_block_rw(card, card->function, handle, (u8 *)pdata, (u16)len, direction); if (csrResult != CSR_RESULT_SUCCESS) { unifi_error(card->ospriv, "Block %s failed\n", (direction == UNIFI_SDIO_READ)?"read" : "write"); return csrResult; } return CSR_RESULT_SUCCESS; } /* unifi_bulk_rw_noretry() */