Fixed bug in mmc driver (can now write to SD-Card within Linux). Changed

some kernel configs to support ext2 on SD-Card


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@7503 3c298f89-4303-0410-b956-a3cf2f4a3e73

2 files changed, 436 insertions, 0 deletions

diff --git a/target/linux/at91-2.6/patches/012-at91-mmcfix.patch b/target/linux/at91-2.6/patches/012-at91-mmcfix.patch
new file mode 100644
index 000000000..e8991ae61
--- /dev/null
+++ b/target/linux/at91-2.6/patches/012-at91-mmcfix.patch
@@ -0,0 +1,424 @@
+--- linux-2.6.21.1.old/drivers/mmc/at91_mci.c	2007-06-05 09:08:57.000000000 +0200
++++ linux-2.6.21.1/drivers/mmc/at91_mci.c	2007-06-05 10:59:11.000000000 +0200
+@@ -79,7 +79,8 @@
+ 
+ #define DRIVER_NAME "at91_mci"
+ 
+-#undef	SUPPORT_4WIRE
++//#undef	SUPPORT_4WIRE
++#define 	SUPPORT_4WIRE
+ 
+ #define FL_SENT_COMMAND	(1 << 0)
+ #define FL_SENT_STOP	(1 << 1)
+@@ -132,7 +133,7 @@
+ /*
+  * Copy from sg to a dma block - used for transfers
+  */
+-static inline void at91mci_sg_to_dma(struct at91mci_host *host, struct mmc_data *data)
++static inline void at91_mci_sg_to_dma(struct at91mci_host *host, struct mmc_data *data)
+ {
+ 	unsigned int len, i, size;
+ 	unsigned *dmabuf = host->buffer;
+@@ -181,7 +182,7 @@
+ /*
+  * Prepare a dma read
+  */
+-static void at91mci_pre_dma_read(struct at91mci_host *host)
++static void at91_mci_pre_dma_read(struct at91mci_host *host)
+ {
+ 	int i;
+ 	struct scatterlist *sg;
+@@ -249,23 +250,24 @@
+ /*
+  * Handle after a dma read
+  */
+-static void at91mci_post_dma_read(struct at91mci_host *host)
++static int at91_mci_post_dma_read(struct at91mci_host *host)
+ {
+ 	struct mmc_command *cmd;
+ 	struct mmc_data *data;
++	int completed = 0;
+ 
+ 	pr_debug("post dma read\n");
+ 
+ 	cmd = host->cmd;
+ 	if (!cmd) {
+ 		pr_debug("no command\n");
+-		return;
++		return 1;
+ 	}
+ 
+ 	data = cmd->data;
+ 	if (!data) {
+ 		pr_debug("no data\n");
+-		return;
++		return 1;
+ 	}
+ 
+ 	while (host->in_use_index < host->transfer_index) {
+@@ -300,39 +302,14 @@
+ 
+ 	/* Is there another transfer to trigger? */
+ 	if (host->transfer_index < data->sg_len)
+-		at91mci_pre_dma_read(host);
++		at91_mci_pre_dma_read(host);
+ 	else {
++		at91_mci_write(host, AT91_MCI_IDR, AT91_MCI_ENDRX);
+ 		at91_mci_write(host, AT91_MCI_IER, AT91_MCI_RXBUFF);
+-		at91_mci_write(host, ATMEL_PDC_PTCR, ATMEL_PDC_RXTDIS | ATMEL_PDC_TXTDIS);
+ 	}
+ 
+ 	pr_debug("post dma read done\n");
+-}
+-
+-/*
+- * Handle transmitted data
+- */
+-static void at91_mci_handle_transmitted(struct at91mci_host *host)
+-{
+-	struct mmc_command *cmd;
+-	struct mmc_data *data;
+-
+-	pr_debug("Handling the transmit\n");
+-
+-	/* Disable the transfer */
+-	at91_mci_write(host, ATMEL_PDC_PTCR, ATMEL_PDC_RXTDIS | ATMEL_PDC_TXTDIS);
+-
+-	/* Now wait for cmd ready */
+-	at91_mci_write(host, AT91_MCI_IDR, AT91_MCI_TXBUFE);
+-	at91_mci_write(host, AT91_MCI_IER, AT91_MCI_NOTBUSY);
+-
+-	cmd = host->cmd;
+-	if (!cmd) return;
+-
+-	data = cmd->data;
+-	if (!data) return;
+-
+-	data->bytes_xfered = host->total_length;
++	return completed;
+ }
+ 
+ /*
+@@ -340,10 +317,17 @@
+  */
+ static void at91_mci_enable(struct at91mci_host *host)
+ {
++	unsigned int mr;
++
+ 	at91_mci_write(host, AT91_MCI_CR, AT91_MCI_MCIEN);
+ 	at91_mci_write(host, AT91_MCI_IDR, 0xffffffff);
+ 	at91_mci_write(host, AT91_MCI_DTOR, AT91_MCI_DTOMUL_1M | AT91_MCI_DTOCYC);
+-	at91_mci_write(host, AT91_MCI_MR, AT91_MCI_PDCMODE | 0x34a);
++	mr = AT91_MCI_PDCMODE | 0x34a;
++
++	if (cpu_is_at91sam9260() || cpu_is_at91sam9263())
++		mr |= AT91_MCI_RDPROOF | AT91_MCI_WRPROOF;
++
++	at91_mci_write(host, AT91_MCI_MR, mr);
+ 
+ 	/* use Slot A or B (only one at same time) */
+ 	at91_mci_write(host, AT91_MCI_SDCR, host->board->slot_b);
+@@ -359,9 +343,8 @@
+ 
+ /*
+  * Send a command
+- * return the interrupts to enable
+  */
+-static unsigned int at91_mci_send_command(struct at91mci_host *host, struct mmc_command *cmd)
++static void at91_mci_send_command(struct at91mci_host *host, struct mmc_command *cmd)
+ {
+ 	unsigned int cmdr, mr;
+ 	unsigned int block_length;
+@@ -372,8 +355,7 @@
+ 
+ 	host->cmd = cmd;
+ 
+-	/* Not sure if this is needed */
+-#if 0
++	/* Needed for leaving busy state before CMD1 */
+ 	if ((at91_mci_read(host, AT91_MCI_SR) & AT91_MCI_RTOE) && (cmd->opcode == 1)) {
+ 		pr_debug("Clearing timeout\n");
+ 		at91_mci_write(host, AT91_MCI_ARGR, 0);
+@@ -383,7 +365,7 @@
+ 			pr_debug("Clearing: SR = %08X\n", at91_mci_read(host, AT91_MCI_SR));
+ 		}
+ 	}
+-#endif
++
+ 	cmdr = cmd->opcode;
+ 
+ 	if (mmc_resp_type(cmd) == MMC_RSP_NONE)
+@@ -440,50 +422,48 @@
+ 		at91_mci_write(host, ATMEL_PDC_TCR, 0);
+ 		at91_mci_write(host, ATMEL_PDC_TNPR, 0);
+ 		at91_mci_write(host, ATMEL_PDC_TNCR, 0);
++		ier = AT91_MCI_CMDRDY;
++	} else {
++		/* zero block length in PDC mode */
++		mr = at91_mci_read(host, AT91_MCI_MR) & 0x7fff;
++		at91_mci_write(host, AT91_MCI_MR, mr | (block_length << 16) | AT91_MCI_PDCMODE);
++
++		/*
++		 * Disable the PDC controller
++		 */
++		at91_mci_write(host, ATMEL_PDC_PTCR, ATMEL_PDC_RXTDIS | ATMEL_PDC_TXTDIS);
+ 
+-		at91_mci_write(host, AT91_MCI_ARGR, cmd->arg);
+-		at91_mci_write(host, AT91_MCI_CMDR, cmdr);
+-		return AT91_MCI_CMDRDY;
+-	}
+-
+-	mr = at91_mci_read(host, AT91_MCI_MR) & 0x7fff;	/* zero block length and PDC mode */
+-	at91_mci_write(host, AT91_MCI_MR, mr | (block_length << 16) | AT91_MCI_PDCMODE);
+-
+-	/*
+-	 * Disable the PDC controller
+-	 */
+-	at91_mci_write(host, ATMEL_PDC_PTCR, ATMEL_PDC_RXTDIS | ATMEL_PDC_TXTDIS);
+-
+-	if (cmdr & AT91_MCI_TRCMD_START) {
+-		data->bytes_xfered = 0;
+-		host->transfer_index = 0;
+-		host->in_use_index = 0;
+-		if (cmdr & AT91_MCI_TRDIR) {
+-			/*
+-			 * Handle a read
+-			 */
+-			host->buffer = NULL;
+-			host->total_length = 0;
++		if (cmdr & AT91_MCI_TRCMD_START) {
++			data->bytes_xfered = 0;
++			host->transfer_index = 0;
++			host->in_use_index = 0;
++			if (cmdr & AT91_MCI_TRDIR) {
++				/*
++				 * Handle a read
++				 */
++				host->buffer = NULL;
++				host->total_length = 0;
+ 
+-			at91mci_pre_dma_read(host);
+-			ier = AT91_MCI_ENDRX /* | AT91_MCI_RXBUFF */;
+-		}
+-		else {
+-			/*
+-			 * Handle a write
+-			 */
+-			host->total_length = block_length * blocks;
+-			host->buffer = dma_alloc_coherent(NULL,
+-						  host->total_length,
+-						  &host->physical_address, GFP_KERNEL);
+-
+-			at91mci_sg_to_dma(host, data);
+-
+-			pr_debug("Transmitting %d bytes\n", host->total_length);
+-
+-			at91_mci_write(host, ATMEL_PDC_TPR, host->physical_address);
+-			at91_mci_write(host, ATMEL_PDC_TCR, host->total_length / 4);
+-			ier = AT91_MCI_TXBUFE;
++				at91_mci_pre_dma_read(host);
++				ier = AT91_MCI_ENDRX /* | AT91_MCI_RXBUFF */;
++			}
++			else {
++				/*
++			 	* Handle a write
++			 	*/
++				host->total_length = block_length * blocks;
++				host->buffer = dma_alloc_coherent(NULL,
++							host->total_length,
++							&host->physical_address, GFP_KERNEL);
++
++				at91_mci_sg_to_dma(host, data);
++
++				pr_debug("Transmitting %d bytes\n", host->total_length);
++
++				at91_mci_write(host, ATMEL_PDC_TPR, host->physical_address);
++				at91_mci_write(host, ATMEL_PDC_TCR, host->total_length / 4);
++				ier = AT91_MCI_CMDRDY;
++			}
+ 		}
+ 	}
+ 
+@@ -498,39 +478,24 @@
+ 	if (cmdr & AT91_MCI_TRCMD_START) {
+ 		if (cmdr & AT91_MCI_TRDIR)
+ 			at91_mci_write(host, ATMEL_PDC_PTCR, ATMEL_PDC_RXTEN);
+-		else
+-			at91_mci_write(host, ATMEL_PDC_PTCR, ATMEL_PDC_TXTEN);
+ 	}
+-	return ier;
+-}
+ 
+-/*
+- * Wait for a command to complete
+- */
+-static void at91mci_process_command(struct at91mci_host *host, struct mmc_command *cmd)
+-{
+-	unsigned int ier;
+-
+-	ier = at91_mci_send_command(host, cmd);
+-
+-	pr_debug("setting ier to %08X\n", ier);
+-
+-	/* Stop on errors or the required value */
++	/* Enable selected interrupts */
+ 	at91_mci_write(host, AT91_MCI_IER, AT91_MCI_ERRORS | ier);
+ }
+ 
+ /*
+  * Process the next step in the request
+  */
+-static void at91mci_process_next(struct at91mci_host *host)
++static void at91_mci_process_next(struct at91mci_host *host)
+ {
+ 	if (!(host->flags & FL_SENT_COMMAND)) {
+ 		host->flags |= FL_SENT_COMMAND;
+-		at91mci_process_command(host, host->request->cmd);
++		at91_mci_send_command(host, host->request->cmd);
+ 	}
+ 	else if ((!(host->flags & FL_SENT_STOP)) && host->request->stop) {
+ 		host->flags |= FL_SENT_STOP;
+-		at91mci_process_command(host, host->request->stop);
++		at91_mci_send_command(host, host->request->stop);
+ 	}
+ 	else
+ 		mmc_request_done(host->mmc, host->request);
+@@ -539,7 +504,7 @@
+ /*
+  * Handle a command that has been completed
+  */
+-static void at91mci_completed_command(struct at91mci_host *host)
++static void at91_mci_completed_command(struct at91mci_host *host)
+ {
+ 	struct mmc_command *cmd = host->cmd;
+ 	unsigned int status;
+@@ -583,7 +548,7 @@
+ 	else
+ 		cmd->error = MMC_ERR_NONE;
+ 
+-	at91mci_process_next(host);
++	at91_mci_process_next(host);
+ }
+ 
+ /*
+@@ -595,7 +560,60 @@
+ 	host->request = mrq;
+ 	host->flags = 0;
+ 
+-	at91mci_process_next(host);
++	at91_mci_process_next(host);
++}
++
++/*
++ * Handle transmitted data
++ */
++static void at91_mci_handle_transmitted(struct at91mci_host *host)
++{
++	struct mmc_command *cmd;
++	struct mmc_data *data;
++
++	pr_debug("Handling the transmit\n");
++
++	/* Disable the transfer */
++	at91_mci_write(host, ATMEL_PDC_PTCR, ATMEL_PDC_RXTDIS | ATMEL_PDC_TXTDIS);
++
++	/* Now wait for cmd ready */
++	at91_mci_write(host, AT91_MCI_IDR, AT91_MCI_TXBUFE);
++
++	cmd = host->cmd;
++	if (!cmd) return;
++
++	data = cmd->data;
++	if (!data) return;
++
++	if (cmd->opcode == MMC_WRITE_MULTIPLE_BLOCK) {
++		pr_debug("multiple write : wait for BLKE...\n");
++		at91_mci_write(host, AT91_MCI_IER, AT91_MCI_BLKE);
++	} else
++		at91_mci_write(host, AT91_MCI_IER, AT91_MCI_NOTBUSY);
++
++	data->bytes_xfered = host->total_length;
++}
++
++
++/*Handle after command sent ready*/
++static int at91_mci_handle_cmdrdy(struct at91mci_host *host)
++{
++	if (!host->cmd)
++		return 1;
++	else if (!host->cmd->data) {
++		if (host->flags & FL_SENT_STOP) {
++			/*After multi block write, we mus wait for NOTBUSY*/
++			at91_mci_write(host, AT91_MCI_IER, AT91_MCI_NOTBUSY);
++		} else return 1;
++	} else if (host->cmd->data->flags & MMC_DATA_WRITE) {
++		/*After sending multi-block-write command, start DMA transfer*/
++		at91_mci_write(host, AT91_MCI_IER, AT91_MCI_TXBUFE);
++		at91_mci_write(host, AT91_MCI_IER, AT91_MCI_BLKE);
++		at91_mci_write(host, ATMEL_PDC_PTCR, ATMEL_PDC_TXTEN);
++	}
++
++	/* command not completed, have to wait */
++	return 0;
+ }
+ 
+ /*
+@@ -698,29 +716,33 @@
+ 			at91_mci_handle_transmitted(host);
+ 		}
+ 
++		if (int_status & AT91_MCI_ENDRX) {
++			pr_debug("ENDRX\n");
++			at91_mci_post_dma_read(host);
++		}
++
+ 		if (int_status & AT91_MCI_RXBUFF) {
+ 			pr_debug("RX buffer full\n");
+-			at91_mci_write(host, AT91_MCI_IER, AT91_MCI_CMDRDY);
++			at91_mci_write(host, ATMEL_PDC_PTCR, ATMEL_PDC_RXTDIS | ATMEL_PDC_TXTDIS);
++			at91_mci_write(host, AT91_MCI_IDR, AT91_MCI_RXBUFF | AT91_MCI_ENDRX);
++			completed = 1;
+ 		}
+ 
+ 		if (int_status & AT91_MCI_ENDTX)
+ 			pr_debug("Transmit has ended\n");
+ 
+-		if (int_status & AT91_MCI_ENDRX) {
+-			pr_debug("Receive has ended\n");
+-			at91mci_post_dma_read(host);
+-		}
+-
+ 		if (int_status & AT91_MCI_NOTBUSY) {
+ 			pr_debug("Card is ready\n");
+-			at91_mci_write(host, AT91_MCI_IER, AT91_MCI_CMDRDY);
++			completed = 1;
+ 		}
+ 
+ 		if (int_status & AT91_MCI_DTIP)
+ 			pr_debug("Data transfer in progress\n");
+ 
+-		if (int_status & AT91_MCI_BLKE)
++		if (int_status & AT91_MCI_BLKE) {
+ 			pr_debug("Block transfer has ended\n");
++			completed = 1;
++		}
+ 
+ 		if (int_status & AT91_MCI_TXRDY)
+ 			pr_debug("Ready to transmit\n");
+@@ -730,14 +752,14 @@
+ 
+ 		if (int_status & AT91_MCI_CMDRDY) {
+ 			pr_debug("Command ready\n");
+-			completed = 1;
++			completed = at91_mci_handle_cmdrdy(host);
+ 		}
+ 	}
+ 
+ 	if (completed) {
+ 		pr_debug("Completed command\n");
+ 		at91_mci_write(host, AT91_MCI_IDR, 0xffffffff);
+-		at91mci_completed_command(host);
++		at91_mci_completed_command(host);
+ 	} else
+ 		at91_mci_write(host, AT91_MCI_IDR, int_status);
+ 
diff --git a/target/linux/at91-2.6/patches/013-at91-mmc1wire.patch b/target/linux/at91-2.6/patches/013-at91-mmc1wire.patch
new file mode 100644
index 000000000..31b1e9677
--- /dev/null
+++ b/target/linux/at91-2.6/patches/013-at91-mmc1wire.patch
@@ -0,0 +1,12 @@
+--- linux-2.6.21.1.old/drivers/mmc/at91_mci.c	2007-06-05 11:08:39.000000000 +0200
++++ linux-2.6.21.1/drivers/mmc/at91_mci.c	2007-06-05 11:28:40.000000000 +0200
+@@ -79,8 +79,7 @@
+ 
+ #define DRIVER_NAME "at91_mci"
+ 
+-//#undef	SUPPORT_4WIRE
+-#define 	SUPPORT_4WIRE
++#undef	SUPPORT_4WIRE
+ 
+ #define FL_SENT_COMMAND	(1 << 0)
+ #define FL_SENT_STOP	(1 << 1)