356 lines
7.9 KiB
C
356 lines
7.9 KiB
C
#include <nuttx/wireless/ieee80211/mmc_sdio.h>
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#include <debug.h>
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#include <errno.h>
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#include <nuttx/arch.h>
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#define SDIO_CMD53_TIMEOUT_MS 100
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#define SDIO_IDLE_DELAY_MS 50
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struct __attribute__((packed)) sdio_cmd52 {
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uint32_t write_data : 8;
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uint32_t reserved_8 : 1;
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uint32_t register_address : 17;
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uint32_t reserved_26 : 1;
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uint32_t raw_flag : 1;
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uint32_t function_number : 3;
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uint32_t rw_flag : 1;
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};
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struct __attribute__((packed)) sdio_cmd53 {
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uint32_t byte_block_count : 9;
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uint32_t register_address : 17;
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uint32_t op_code : 1;
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uint32_t block_mode : 1;
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uint32_t function_number : 3;
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uint32_t rw_flag : 1;
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};
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struct __attribute__((packed)) sdio_resp_R5 {
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uint32_t data : 8;
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struct {
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uint32_t out_of_range : 1;
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uint32_t function_number : 1;
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uint32_t rfu : 1;
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uint32_t error : 1;
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uint32_t io_current_state : 2;
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uint32_t illegal_command : 1;
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uint32_t com_crc_error : 1;
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} flags;
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uint32_t reserved_16 : 16;
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};
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union sdio_cmd5x {
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uint32_t value;
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struct sdio_cmd52 cmd52;
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struct sdio_cmd53 cmd53;
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};
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int sdio_sendcmdpoll(FAR struct sdio_dev_s *dev, uint32_t cmd, uint32_t arg)
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{
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int ret;
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/* Send the command */
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ret = SDIO_SENDCMD(dev, cmd, arg);
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if (ret == OK)
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{
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/* Then poll-wait until the response is available */
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ret = SDIO_WAITRESPONSE(dev, cmd);
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if (ret != OK)
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{
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_err("ERROR: Wait for response to cmd: %08x failed: %d\n",
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cmd, ret);
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}
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}
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return ret;
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}
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int sdio_io_rw_direct(FAR struct sdio_dev_s *dev, bool write,
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uint8_t function, uint32_t address,
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uint8_t inb, uint8_t* outb)
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{
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union sdio_cmd5x arg;
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struct sdio_resp_R5 resp;
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int ret;
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/* Setup CMD52 argument */
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arg.cmd52.write_data = inb;
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arg.cmd52.register_address = address & 0x1ffff;
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arg.cmd52.raw_flag = (write && outb);
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arg.cmd52.function_number = function & 7;
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arg.cmd52.rw_flag = write;
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/* Send CMD52 command */
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sdio_sendcmdpoll(dev, SDIO_ACMD52, arg.value);
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ret = SDIO_RECVR5(dev, SDIO_ACMD52, (uint32_t*)&resp);
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if (ret != OK)
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{
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_err("ERROR: SDIO_RECVR5 failed %d\n", ret);
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return ret;
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}
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/* Check for errors */
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if (resp.flags.error)
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{
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return -EIO;
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}
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if (resp.flags.function_number || resp.flags.out_of_range)
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{
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return -EINVAL;
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}
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/* Write output byte */
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if (outb)
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{
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*outb = resp.data & 0xff;
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}
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return OK;
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}
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// int sdio_io_rw_extended(FAR struct sdio_dev_s *dev, bool write,
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// uint8_t function, uint32_t address,
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// bool inc_addr, uint8_t *buf,
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// unsigned int blocklen, unsigned int nblocks)
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// {
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// struct sdio_cmd53 arg;
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// struct sdio_resp_R5 resp;
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// int ret;
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// sdio_eventset_t wkupevent;
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//
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// /* Setup CMD53 argument */
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//
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// arg.byte_block_count = blocklen;
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// arg.register_address = address & 0x1ff;
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// arg.op_code = inc_addr;
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// arg.function_number = function & 7;
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// arg.rw_flag = write;
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//
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// if (nblocks <= 1 && blocklen < 512)
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// {
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// /* Use byte mode */
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//
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// arg.block_mode = 0;
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// nblocks = 1;
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// }
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// else
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// {
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// /* Use block mode */
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//
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// arg.block_mode = 1;
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// }
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//
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// /* Send CMD53 command */
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//
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// SDIO_BLOCKSETUP(dev, blocklen, nblocks);
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// SDIO_WAITENABLE(dev,
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// SDIOWAIT_TRANSFERDONE | SDIOWAIT_TIMEOUT | SDIOWAIT_ERROR);
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//
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// sdio_sendcmdpoll(dev, SDIO_ACMD53, (uint32_t)arg);
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// ret = SDIO_RECVR5(dev, SDIO_ACMD53, (uint32_t*)&resp);
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//
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// if (write)
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// {
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// sdio_sendcmdpoll(dev, SDIO_ACMD53, (uint32_t)arg);
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// ret = SDIO_RECVR5(dev, SDIO_ACMD53, (uint32_t*)&resp);
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//
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// SDIO_SENDSETUP(dev, buf, blocklen * nblocks);
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// wkupevent = SDIO_EVENTWAIT(dev, SDIO_CMD53_TIMEOUT_MS);
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// }
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// else
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// {
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// SDIO_RECVSETUP(dev, buf, blocklen * nblocks);
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// SDIO_SENDCMD(dev, SDIO_ACMD53, (uint32_t)arg);
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//
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// wkupevent = SDIO_EVENTWAIT(dev, SDIO_CMD53_TIMEOUT_MS);
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// ret = SDIO_RECVR5(dev, SDIO_ACMD53, (uint32_t*)&resp);
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// }
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//
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// if (ret != OK)
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// {
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// _err("ERROR: SDIO_RECVR5 failed %d\n", ret);
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// return ret;
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// }
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//
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// /* Check for errors */
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//
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// if (wkupevent & SDIOWAIT_TIMEOUT)
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// {
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// return -ETIMEDOUT;
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// }
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// if (resp.error || (wkupevent & SDIOWAIT_ERROR))
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// {
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// return -EIO;
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// }
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// if (resp.function_number || resp.out_of_range)
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// {
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// return -EINVAL;
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// }
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//
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// return OK;
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// }
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int sdio_set_wide_bus(struct sdio_dev_s *dev)
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{
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int ret;
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uint8_t value;
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/* Read Bus Interface Control register */
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ret = sdio_io_rw_direct(dev, false, 0, SDIO_CCCR_BUS_IF, 0, &value);
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if (ret != OK)
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{
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return ret;
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}
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/* Set 4 bits bus width setting */
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value &= ~SDIO_CCCR_BUS_IF_WIDTH_MASK;
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value |= SDIO_CCCR_BUS_IF_4_BITS;
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ret = sdio_io_rw_direct(dev, true, 0, SDIO_CCCR_BUS_IF, value, NULL);
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if (ret != OK)
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{
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return ret;
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}
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SDIO_WIDEBUS(dev, true);
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return OK;
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}
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int sdio_probe(FAR struct sdio_dev_s *dev)
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{
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int ret;
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uint32_t data = 0;
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/* Set device state from reset to idle */
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sdio_sendcmdpoll(dev, MMCSD_CMD0, 0);
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up_mdelay(SDIO_IDLE_DELAY_MS);
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/* Device is SDIO card compatible so we can send CMD5 instead of ACMD41 */
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sdio_sendcmdpoll(dev, SDIO_CMD5, 0);
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/* Receive R4 response */
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ret = SDIO_RECVR4(dev, SDIO_CMD5, &data);
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if (ret != OK)
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{
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return ret;
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}
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/* Device is in Card Identification Mode, request device RCA */
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sdio_sendcmdpoll(dev, SD_CMD3, 0);
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ret = SDIO_RECVR6(dev, SD_CMD3, &data);
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if (ret != OK)
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{
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_err("ERROR: RCA request failed: %d\n", ret);
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return ret;
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}
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_info("rca is %x\n", data >> 16);
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/* Send CMD7 with the argument == RCA in order to select the card
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* and put it in Transfer State */
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sdio_sendcmdpoll(dev, MMCSD_CMD7S, data & 0xffff0000);
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ret = SDIO_RECVR1(dev, MMCSD_CMD7S, &data);
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if (ret != OK)
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{
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_err("ERROR: card selection failed: %d\n", ret);
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return ret;
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}
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/* Configure 4 bits bus width */
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ret = sdio_set_wide_bus(dev);
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if (ret != OK)
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{
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return ret;
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}
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return OK;
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}
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int sdio_set_blocksize(FAR struct sdio_dev_s *dev, uint8_t function,
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uint16_t blocksize)
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{
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int ret;
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ret = sdio_io_rw_direct(dev, true, 0,
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(function << SDIO_FBR_SHIFT) + SDIO_CCCR_FN0_BLKSIZE_0,
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blocksize & 0xff, NULL);
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if (ret != OK)
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{
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return ret;
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}
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ret = sdio_io_rw_direct(dev, true, 0,
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(function << SDIO_FBR_SHIFT) + SDIO_CCCR_FN0_BLKSIZE_1,
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(blocksize >> 8), NULL);
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if (ret != OK)
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{
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return ret;
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}
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return OK;
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}
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int sdio_enable_function(FAR struct sdio_dev_s *dev, uint8_t function)
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{
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int ret;
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uint8_t value;
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/* Read current I/O Enable register */
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ret = sdio_io_rw_direct(dev, false, 0, SDIO_CCCR_IOEN, 0, &value);
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if (ret != OK)
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{
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return ret;
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}
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ret = sdio_io_rw_direct(dev, true, 0, SDIO_CCCR_IOEN, value | (1 << function), NULL);
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if (ret != OK)
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{
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return ret;
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}
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/* Wait 10ms for function to be enabled */
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int loops = 10;
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while (loops-- > 0)
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{
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up_mdelay(1);
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ret = sdio_io_rw_direct(dev, false, 0, SDIO_CCCR_IOEN, 0, &value);
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if (ret != OK)
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{
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return ret;
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}
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if (value & (1 << function))
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{
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/* Function enabled */
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_info("Function %d enabled\n", function);
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return OK;
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}
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}
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return -ETIMEDOUT;
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}
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