diff options
Diffstat (limited to 'drivers/staging/csr/csr_wifi_hip_card_sdio_mem.c')
| -rw-r--r-- | drivers/staging/csr/csr_wifi_hip_card_sdio_mem.c | 1713 |
1 files changed, 0 insertions, 1713 deletions
diff --git a/drivers/staging/csr/csr_wifi_hip_card_sdio_mem.c b/drivers/staging/csr/csr_wifi_hip_card_sdio_mem.c deleted file mode 100644 index 17867f60df16..000000000000 --- a/drivers/staging/csr/csr_wifi_hip_card_sdio_mem.c +++ /dev/null @@ -1,1713 +0,0 @@ -/***************************************************************************** - - (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() */ - - |