updating with more commands

shared/drivers/.#sd_mmc.c

@@ -1 +0,0 @@
-penguin@penguin-arch-home.4569:1608044795

shared/drivers/sd_mmc.c

@@ -2,42 +2,22 @@
 #include "sd_mmc_intf.h"
 #include <assert.h>
 
-static bool sd_mmc_check_cd(void)
-{
-	switch(SD_MMC_CD_MODE)
-	{
-		case SD_MMC_CD_MODE_UNUSED:
-		{
-			// Always assume the card is detected since we aren't using this function
-			return true;
-		}break;
-		case SD_MMC_CD_MODE_SYNC:
-		{
-			return SD_MMC_INTF_CHECK_CD();
-		}break;
-		case SD_MMC_CD_MODE_ASYNC:
-		{
-			// Unimplemented
-			return false;
-		}break;
-		default:
-		{
-			return false;
-		}
-	}
-	return false;
-}
 
-// send 80 clock cycles
-static void sd_mmc_send_clock()
-{
-	uint8_t i;
-	uint8_t dummy = 0xFF;
-	for(i = 0; i < 10; i++)
-	{
-		SD_MMC_INTF_WRITE(&dummy, 1);
-	}
-}
+// Functions used to interact with the SD card
+static sd_mmc_err_t sd_mmc_power_up_sequence();
+static sd_mmc_err_t sd_mmc_idle_sequence();
+static sd_mmc_err_t sd_mmc_if_sequence();
+static sd_mmc_err_t sd_mmc_read_ocr(uint8_t* res);
+static sd_mmc_err_t sd_mmc_read_res1(uint8_t* res1);
+static sd_mmc_err_t sd_mmc_read_res7(uint8_t* res7);
+static sd_mmc_err_t sd_mmc_read_res3(uint8_t* res3);
+static bool sd_mmc_check_cd(void);
+static void sd_mmc_send_clock(void);
+
+// Functions used for debugging
+static void sd_mmc_print_err(sd_mmc_err_t err);
+static void sd_mmc_print_res1(uint8_t res);
+static void sd_mmc_print_res7(const uint8_t* const res);
 
 sd_mmc_err_t sd_mmc_init(void)
 {
@@ -45,34 +25,39 @@ sd_mmc_err_t sd_mmc_init(void)
 
 	do
 	{
+		// Hardware initialize
 		if(0 != SD_MMC_INTF_INIT())
 		{
 			ret = SD_MMC_INIT_FAILURE;
 			break;
 		}
-		// power up sequence
-		delay_ms(1);
-		sd_mmc_send_clock();
-		// go idle
-		sd_mmc_select(0, 0, 0, true);
-		if(0 != sd_mmc_send_command(CMD0, CMD0_ARG, CMD0_CRC))
+
+		// Power up sd card sequence
+		if((ret != sd_mmc_power_up_sequence()) != SD_MMC_SUCCESS)
 		{
-			ret = SD_MMC_ERR_COMM;
 			break;
 		}
 
-		uint8_t res1_ret = 0xFF;
-		if(0 != sd_mmc_read_res1(&res1_ret))
+		// go idle
+		if((ret != sd_mmc_idle_sequence()) != SD_MMC_SUCCESS)
 		{
-			ret = SD_MMC_ERR_COMM;
 			break;
 		}
-		sd_mmc_deselect(0);
 
-		
+		// interface sequence
+		if((ret != sd_mmc_if_sequence()) != SD_MMC_SUCCESS)
+		{
+			break;
+		}
 
-		printf("res1: 0x%02x\n", res1_ret);
 	}while(0);
+
+	if(ret != SD_MMC_SUCCESS)
+	{
+		printf("Error initializing SD Card: ");
+		sd_mmc_print_err(ret);
+	}
+
 	return ret;
 }
 
@@ -92,7 +77,6 @@ sd_mmc_err_t sd_mmc_select(uint8_t slot, uint32_t clock, uint8_t bus_width, bool
 	sd_mmc_err_t ret = SD_MMC_SUCCESS;
 	SD_MMC_INTF_SELECT_DEVICE();
 	return ret;
-
 }
 
 sd_mmc_err_t sd_mmc_send_command(uint8_t cmd, uint32_t arg, uint8_t crc)
@@ -113,7 +97,7 @@ sd_mmc_err_t sd_mmc_send_command(uint8_t cmd, uint32_t arg, uint8_t crc)
 }
 
 
-sd_mmc_err_t sd_mmc_read_res1(uint8_t* ret_byte)
+sd_mmc_err_t sd_mmc_read_res1(uint8_t* byte)
 {
 	sd_mmc_err_t ret = SD_MMC_SUCCESS;
 
@@ -121,11 +105,263 @@ sd_mmc_err_t sd_mmc_read_res1(uint8_t* ret_byte)
 	do
 	{
 		i++;
-		SD_MMC_INTF_READ(ret_byte, 1);
-	}while(i <= 8 && *ret_byte == 0xFF);
-	if(*ret_byte == 0xFF)
+		SD_MMC_INTF_READ(byte, 1);
+	}while(i <= 8 && *byte == 0xFF);
+	if(*byte == 0xFF)
 	{
 		return SD_MMC_TIMEOUT;
 	}
+
+	return ret;
+}
+
+sd_mmc_err_t sd_mmc_read_res7(uint8_t* res7)
+{
+	sd_mmc_err_t ret = SD_MMC_SUCCESS;
+	do
+	{
+		if(5 != SD_MMC_INTF_READ(res7, 5))
+		{
+			ret = SD_MMC_ERR_COMM;
+			break;
+		}
+
+		if(res7[0] > 1)
+		{
+			// handle this error better later
+			ret = SD_MMC_ERR_COMM;
+			break;
+		}
+	}while(0);
+	return ret;
+}
+
+sd_mmc_err_t sd_mmc_read_res3(uint8_t* res3)
+{
+	sd_mmc_err_t ret = SD_MMC_SUCCESS;
+	do
+	{
+		if(5 != SD_MMC_INTF_READ(res3, 5))
+		{
+			ret = SD_MMC_ERR_COMM;
+			break;
+		}
+
+		if(res3[0] > 1)
+		{
+			// handle this error better later
+			ret = SD_MMC_ERR_COMM;
+			break;
+		}
+	}while(0);
+	return ret;
+
+}
+sd_mmc_err_t sd_mmc_power_up_sequence()
+{
+	sd_mmc_err_t ret = SD_MMC_SUCCESS;
+	// power up sequence
+	delay_ms(1);
+	sd_mmc_send_clock();
+	return ret;
+}
+
+sd_mmc_err_t sd_mmc_idle_sequence()
+{
+	sd_mmc_err_t ret = SD_MMC_SUCCESS;
+	uint8_t res1 = 0xFF;
+
+	sd_mmc_select(0, 0, 0, false);
+	do
+	{
+		sd_mmc_select(0, 0, 0, true);
+		if((ret != sd_mmc_send_command(CMD0, CMD0_ARG, CMD0_CRC)) != SD_MMC_SUCCESS)
+		{
+			break;
+		}
+
+		if((ret != sd_mmc_read_res1(&res1)) != SD_MMC_SUCCESS)
+		{
+			break;
+		}
+
+		sd_mmc_print_res1(res1);
+	}while(0);
+	sd_mmc_deselect(0);
+	return ret;
+}
+sd_mmc_err_t sd_mmc_if_sequence()
+{
+	sd_mmc_err_t ret = SD_MMC_SUCCESS;
+	uint8_t res7[5];
+
+	sd_mmc_select(0, 0, 0, false);
+	do
+	{
+
+		if((ret = sd_mmc_send_command(CMD8, CMD8_ARG, CMD8_CRC)) != SD_MMC_SUCCESS)
+		{
+			break;
+		}
+
+		if((ret = sd_mmc_read_res7(res7)) != SD_MMC_SUCCESS)
+		{
+			break;
+		}
+
+		sd_mmc_print_res7(res7);
+	}while(0);
+	sd_mmc_deselect(0);
+	return ret;
+}
+
+void sd_mmc_print_err(sd_mmc_err_t err)
+{
+	switch(err)
+	{
+		case SD_MMC_SUCCESS:
+		{
+			printf("%s", "SD_MMC_SUCCESS\n");
+		}break;
+		case SD_MMC_FAILURE:
+		{
+			printf("%s", "SD_MMC_FAILURE\n");
+		}break;
+		case SD_MMC_INIT_ONGOING:
+		{
+			printf("%s", "SD_MMC_INIT_ONGOING\n");
+		}break;
+		case SD_MMC_ERR_NO_CARD:
+		{
+			printf("%s", "SD_MMC_ERR_NO_CARD\n");
+		}
+		case SD_MMC_ERR_UNUSABLE:
+		{
+			printf("%s", "SD_MMC_UNUSABLE\n");
+		}break;
+		case SD_MMC_ERR_SLOT:
+		{
+			printf("%s", "SD_MMC_ERR_SLOT\n");
+		}break;
+		case SD_MMC_ERR_COMM:
+		{
+			printf("%s", "SD_MMC_ERR_COMM\n");
+		}break;
+		case SD_MMC_ERR_PARAM:
+		{
+			printf("%s", "SD_MMC_ERR_PARAM\n");
+		}break;
+		case SD_MMC_ERR_WP:
+		{
+			printf("%s", "SD_MMC_ERR_WP\n");
+		}break;
+		case SD_MMC_INIT_FAILURE:
+		{
+			printf("%s", "SD_MMC_INIT_FAILURE\n");
+		}break;
+		case SD_MMC_TIMEOUT:
+		{
+			printf("%s", "SD_MMC_TIMEOUT\n");
+		}break;
+		default:
+		{
+			printf("%s", "UNKNOWN ERROR");
+		}
+	}
+}
+
+void sd_mmc_print_res1(uint8_t res)
+{
+    if(res & 0b10000000)
+	{ printf("\tError: MSB = 1\r\n"); return; }
+    if(res == 0)
+	{ printf("\tCard Ready\r\n"); return; }
+    if(PARAM_ERROR(res))
+        printf("\tParameter Error\r\n");
+    if(ADDR_ERROR(res))
+        printf("\tAddress Error\r\n");
+    if(ERASE_SEQ_ERROR(res))
+        printf("\tErase Sequence Error\r\n");
+    if(CRC_ERROR(res))
+        printf("\tCRC Error\r\n");
+    if(ILLEGAL_CMD(res))
+        printf("\tIllegal Command\r\n");
+    if(ERASE_RESET(res))
+        printf("\tErase Reset Error\r\n");
+    if(IN_IDLE(res))
+        printf("\tIn Idle State\r\n");
+}
+
+void sd_mmc_print_res7(const uint8_t* const res)
+{
+	sd_mmc_print_res1(res[0]);
+	if(res[0] > 1) return;
+
+	printf("\tCommand Version: 0x%02x\n", CMD_VER(res[1]));
+
+	printf("\tVoltage Accepted: %s\n",
+		   (res[3] == VOLTAGE_ACC_27_33) ? "2.7-3.6V"
+		   : (res[3] == VOLTAGE_ACC_LOW) ? "LOW VOLTAGE"
+		   : (res[3] == VOLTAGE_ACC_RES1 || res[3] ==  VOLTAGE_ACC_RES2) ? "RESERVED"
+		   : "NOT DEFINED");
+	printf("\tEcho: 0x%02x\n", res[4]);
+}
+
+
+bool sd_mmc_check_cd(void)
+{
+	switch(SD_MMC_CD_MODE)
+	{
+		case SD_MMC_CD_MODE_UNUSED:
+		{
+			// Always assume the card is detected since we aren't using this function
+			return true;
+		}break;
+		case SD_MMC_CD_MODE_SYNC:
+		{
+			return SD_MMC_INTF_CHECK_CD();
+		}break;
+		case SD_MMC_CD_MODE_ASYNC:
+		{
+			// Unimplemented
+			return false;
+		}break;
+		default:
+		{
+			return false;
+		}
+	}
+	return false;
+}
+
+void sd_mmc_send_clock()
+{
+	uint8_t i;
+	uint8_t dummy = 0xFF;
+	for(i = 0; i < 10; i++)
+	{
+		SD_MMC_INTF_WRITE(&dummy, 1);
+	}
+}
+
+sd_mmc_err_t sd_mmc_read_ocr(uint8_t* res)
+{
+	sd_mmc_err_t ret = SD_MMC_SUCCESS;
+	uint8_t res3[5];
+
+	sd_mmc_select(0, 0, 0, false);
+	do
+	{
+		if((ret = sd_mmc_send_command(CMD58, CMD58_ARG, CMD58_CRC)) != SD_MMC_SUCCESS)
+		{
+			break;
+		}
+
+		if((ret = sd_mmc_read_res3(res3)) != SD_MMC_SUCCESS)
+		{
+			break;
+		}
+	}while(0);
+	sd_mmc_deselect(0);
 	return ret;
 }

shared/drivers/sd_mmc.h

@@ -12,17 +12,17 @@ typedef enum sd_mmc_mode_t
 
 typedef enum sd_mmc_err_t
 {
-  SD_MMC_SUCCESS = 0,
-  SD_MMC_FAIL = 1,
-  SD_MMC_INIT_ONGOING = 2,
-  SD_MMC_ERR_NO_CARD = 3,
-  SD_MMC_ERR_UNUSABLE = 4,
-  SD_MMC_ERR_SLOT = 5,
-  SD_MMC_ERR_COMM = 6,
-  SD_MMC_ERR_PARAM = 7,
-  SD_MMC_ERR_WP = 8,
-  SD_MMC_INIT_FAILURE = 9,
-  SD_MMC_TIMEOUT = 10
+  SD_MMC_SUCCESS			= 0,
+  SD_MMC_FAILURE			= 1,
+  SD_MMC_INIT_ONGOING		= 2,
+  SD_MMC_ERR_NO_CARD		= 3,
+  SD_MMC_ERR_UNUSABLE		= 4,
+  SD_MMC_ERR_SLOT			= 5,
+  SD_MMC_ERR_COMM			= 6,
+  SD_MMC_ERR_PARAM			= 7,
+  SD_MMC_ERR_WP			= 8,
+  SD_MMC_INIT_FAILURE		= 9,
+  SD_MMC_TIMEOUT			= 10,
 } sd_mmc_err_t;
 
 // The card detect function can be unused, used regularly, or via interrupt.
@@ -41,8 +41,14 @@ sd_mmc_err_t sd_mmc_init(void);
 sd_mmc_err_t sd_mmc_select(uint8_t slot, uint32_t clock, uint8_t bus_width, bool high_speed);
 sd_mmc_err_t sd_mmc_deselect(uint8_t slot);
 sd_mmc_err_t sd_mmc_send_command(uint8_t cmd, uint32_t arg, uint8_t crc);
-sd_mmc_err_t sd_mmc_read_res1(uint8_t* ret_byte);
 
+#define PARAM_ERROR(x)			(x & 0b01000000)
+#define ADDR_ERROR(x)			(x & 0b00100000)
+#define ERASE_SEQ_ERROR(x)		(x & 0b00010000)
+#define CRC_ERROR(x)			(x & 0b00001000)
+#define ILLEGAL_CMD(x)			(x & 0b00000100)
+#define ERASE_RESET(x)			(x & 0b00000010)
+#define IN_IDLE(x)				(x & 0b00000001)
 
 #define SD_MMC_CD_MODE SD_MMC_CD_MODE_SYNC
 
@@ -54,7 +60,23 @@ sd_mmc_err_t sd_mmc_read_res1(uint8_t* ret_byte);
 #define CMD0_ARG	0x00000000
 #define CMD0_CRC	0x94
 
+#define CMD8		8
+#define CMD8_ARG	0x000001AA
+#define CMD8_CRC	0x86
+
+#define CMD58       58
+#define CMD58_ARG   0x00000000
+#define CMD58_CRC   0x00
+
 #define UNUSED(v) (void)(v)
 
+#define CMD_VER(X)          ((X >> 4) & 0xF0)
+#define VOL_ACC(X)          (X & 0x1F)
+
+#define VOLTAGE_ACC_27_33   0b00000001
+#define VOLTAGE_ACC_LOW     0b00000010
+#define VOLTAGE_ACC_RES1    0b00000100
+#define VOLTAGE_ACC_RES2    0b00001000
+
 
 #endif