mmc_disk: add SDHC support.

The main differences:
- The initialization sequence requires an additional command (this was
  already done)
- The layout of the CSD register and the way to compute the device
  geometry from it changes
- The read and write commands parameter is a sector number instead of a
  byte position

Change-Id: Ie729e333c9748f36b37acd70c970adfd425cf0b6
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3512
Reviewed-by: Alex von Gluck IV <[email protected]>

headers/private/drivers/mmc.h

@@ -76,7 +76,7 @@ typedef struct mmc_bus_interface {
 		uint32_t argument, uint32_t* result);
 		// Execute a command with no I/O phase
 	status_t (*do_io)(void* controller, uint8_t command,
-		IOOperation* operation);
+		IOOperation* operation, bool offsetAsSectors);
 		// Execute a command that involves a data transfer.
 } mmc_bus_interface;
 
@@ -92,7 +92,7 @@ typedef struct mmc_device_interface {
 		uint32_t argument, uint32_t* result);
 		// Execute a command with no I/O phase
 	status_t (*do_io)(device_node* controller, uint16_t rca,
-		uint8_t command, IOOperation* operation);
+		uint8_t command, IOOperation* operation, bool offsetAsSectors);
 		// Execute a command that involves a data transfer.
 } mmc_device_interface;
 

src/add-ons/kernel/bus_managers/mmc/mmc_bus.cpp

@@ -86,12 +86,13 @@ MMCBus::ExecuteCommand(uint8_t command, uint32_t argument, uint32_t* response)
 
 
 status_t
-MMCBus::DoIO(uint16_t rca, uint8_t command, IOOperation* operation)
+MMCBus::DoIO(uint16_t rca, uint8_t command, IOOperation* operation,
+	bool offsetAsSectors)
 {
 	status_t status = _ActivateDevice(rca);
 	if (status != B_OK)
 		return status;
-	return fController->do_io(fCookie, command, operation);
+	return fController->do_io(fCookie, command, operation, offsetAsSectors);
 }
 
 

src/add-ons/kernel/bus_managers/mmc/mmc_bus.h

@@ -44,7 +44,8 @@ public:
 				status_t		ExecuteCommand(uint8_t command,
 									uint32_t argument, uint32_t* response);
 				status_t		DoIO(uint16_t rca, uint8_t command,
-									IOOperation* operation);
+									IOOperation* operation,
+									bool offsetAsSectors);
 
 				void			AcquireBus() { acquire_sem(fLockSemaphore); }
 				void			ReleaseBus() { release_sem(fLockSemaphore); }

src/add-ons/kernel/bus_managers/mmc/mmc_module.cpp

@@ -104,7 +104,7 @@ mmc_bus_execute_command(device_node* node, uint8_t command, uint32_t argument,
 
 static status_t
 mmc_bus_do_io(device_node* node, uint16_t rca, uint8_t command,
-	IOOperation* operation)
+	IOOperation* operation, bool offsetAsSectors)
 {
 	driver_module_info* mmc;
 	void* cookie;
@@ -119,7 +119,7 @@ mmc_bus_do_io(device_node* node, uint16_t rca, uint8_t command,
 	bus->AcquireBus();
 	status_t result = B_OK;
 
-	result = bus->DoIO(rca, command, operation);
+	result = bus->DoIO(rca, command, operation, offsetAsSectors);
 
 	bus->ReleaseBus();
 	return result;

src/add-ons/kernel/busses/mmc/sdhci_pci.cpp

@@ -52,7 +52,8 @@ class SdhciBus {
 		status_t			InitCheck();
 		void				Reset();
 		void				SetClock(int kilohertz);
-		status_t			DoIO(uint8_t command, IOOperation* operation);
+		status_t			DoIO(uint8_t command, IOOperation* operation,
+								bool offsetAsSectors);
 		
 	private:
 		bool				PowerOn();
@@ -340,7 +341,7 @@ SdhciBus::SetClock(int kilohertz)
 
 
 status_t
-SdhciBus::DoIO(uint8_t command, IOOperation* operation)
+SdhciBus::DoIO(uint8_t command, IOOperation* operation, bool offsetAsSectors)
 {
 	bool isWrite = operation->IsWrite();
 
@@ -385,8 +386,6 @@ SdhciBus::DoIO(uint8_t command, IOOperation* operation)
 	while (length > 0) {
 		size_t toCopy = std::min((generic_size_t)length,
 			vecs->length - vecOffset);
-		TRACE("Loop %ld bytes from position %ld to %p\n", toCopy, offset,
-			vecs->base + vecOffset);
 
 		// If the current vec is empty, we can move to the next
 		if (toCopy == 0) {
@@ -413,7 +412,8 @@ SdhciBus::DoIO(uint8_t command, IOOperation* operation)
 			| TransferMode::kBlockCountEnable | TransferMode::kDmaEnable;
 
 		uint32_t response;
-		result = ExecuteCommand(command, offset, &response);
+		result = ExecuteCommand(command,
+			offset / (offsetAsSectors ? kBlockSize : 1), &response);
 		if (result != B_OK)
 			break;
 
@@ -817,12 +817,13 @@ execute_command(void* controller, uint8_t command, uint32_t argument,
 
 
 static status_t
-do_io(void* controller, uint8_t command, IOOperation* operation)
+do_io(void* controller, uint8_t command, IOOperation* operation,
+	bool offsetAsSectors)
 {
 	CALLED();
 	
 	SdhciBus* bus = (SdhciBus*)controller;
-	return bus->DoIO(command, operation);
+	return bus->DoIO(command, operation, offsetAsSectors);
 }
 
 

src/add-ons/kernel/drivers/disk/mmc/mmc_disk.cpp

@@ -43,15 +43,29 @@ static device_manager_info* sDeviceManager;
 
 
 struct mmc_disk_csd {
+	// The content of this register is described in Physical Layer Simplified
+	// Specification Version 8.00, section 5.3
 	uint64 bits[2];
 
-	uint8 structure_version() { return bits[1] >> 60; }
+	uint8 structure_version() { return bits[1] >> 54; }
 	uint8 read_bl_len() { return (bits[1] >> 8) & 0xF; }
-	uint16 c_size()
+	uint32 c_size()
 	{
-		return ((bits[0] >> 54) & 0x3FF) | ((bits[1] & 0x3) << 10);
+		if (structure_version() == 0)
+			return ((bits[0] >> 54) & 0x3FF) | ((bits[1] & 0x3) << 10);
+		if (structure_version() == 1)
+			return (bits[0] >> 40) & 0x3FFFFF;
+		return ((bits[0] >> 40) & 0xFFFFFF) | ((bits[1] & 0xF) << 24);
+	}
+
+	uint8 c_size_mult()
+	{
+		if (structure_version() == 0)
+			return (bits[0] >> 39) & 0x7;
+		// In later versions this field is not present in the structure and a
+		// fixed value is used.
+		return 8;
 	}
-	uint8 c_size_mult() { return (bits[0] >> 39) & 0x7; }
 };
 
 
@@ -115,7 +129,8 @@ mmc_disk_execute_iorequest(void* data, IOOperation* operation)
 		command = SD_WRITE_MULTIPLE_BLOCKS;
 	else
 		command = SD_READ_MULTIPLE_BLOCKS;
-	error = info->mmc->do_io(info->parent, info->rca, command, operation);
+	error = info->mmc->do_io(info->parent, info->rca, command, operation,
+		(info->flags & kIoCommandOffsetAsSectors) != 0);
 
 	if (error != B_OK) {
 		info->scheduler->OperationCompleted(operation, error, 0);
@@ -185,6 +200,21 @@ mmc_disk_init_driver(device_node* node, void** cookie)
 		return B_BAD_DATA;
 	}
 
+	uint8_t deviceType;
+	if (sDeviceManager->get_attr_uint8(info->parent, kMmcTypeAttribute,
+			&deviceType, true) != B_OK) {
+		ERROR("Could not get device type\n");
+		free(info);
+		return B_BAD_DATA;
+	}
+
+	// SD and MMC cards use byte offsets for IO commands, later ones (SDHC,
+	// SDXC, ...) use sectors.
+	if (deviceType == CARD_TYPE_SD || deviceType == CARD_TYPE_MMC)
+		info->flags = 0;
+	else
+		info->flags = kIoCommandOffsetAsSectors;
+
 	static const uint32 kBlockSize = 512; // FIXME get it from the CSD
 	status_t error;
 

src/add-ons/kernel/drivers/disk/mmc/mmc_disk.h

@@ -20,12 +20,19 @@
 #include "IOSchedulerSimple.h"
 
 
+enum MMCDiskFlags {
+	kIoCommandOffsetAsSectors = 1,
+		// IO commands use sector offsets instead of byte offsets
+};
+
+
 // This is the device info structure, allocated once per device
 typedef struct {
 	device_node* node;
 	device_node* parent;
 	mmc_device_interface* mmc;
 	uint16_t rca;
+	uint32_t flags;
 
 	device_geometry geometry;