Add driver for S-ATA-controller on Intel processors with South

Bridge, ICH-5, ICH-6 and ICH-7. 

Implementation:

1. Code is divided in to two files. All functions, which are
   controller specific are kept in "drivers/ata_piix.c" file and
   functions, which are not controller specific, are kept in
   "common/cmd_sata.c" file.

2. Reading and Writing from the S-ATA drive is done using PIO method.

3. Driver can be configured for 48-bit addressing by defining macro
   CONFIG_LBA48, if this macro is not defined driver uses the 28-bit
   addressing.

4. S-ATA read function is hooked to the File system, commands like
   ext2ls and ext2load file can be used. This has been tested.

5. U-Boot command "SATA_init" is added, which initializes the S-ATA
   controller and identifies the S-ATA drives connected to it.

6. U-Boot command "sata" is added, which is used to read/write, print
   partition table and get info about the drives present. This I have
   implemented in same way as "ide" command is implemented in U-Boot.

7. This driver is for S-ATA in native mode.

8. This driver does not support the Native command queuing and
   Hot-plugging.

Signed-off-by: Mushtaq Khan <mushtaq_k@procsys.com>

1 files changed, 108 insertions, 0 deletions

diff --git a/include/sata.h b/include/sata.h
new file mode 100644
index 0000000..c6fa2ab
--- /dev/null
+++ b/include/sata.h
@@ -0,0 +1,108 @@
+
+#if (DEBUG_SATA)
+#define PRINTF(fmt,args...)	printf (fmt ,##args)
+#else
+#define PRINTF(fmt,args...)
+#endif
+
+struct sata_ioports {
+	unsigned long cmd_addr;
+	unsigned long data_addr;
+	unsigned long error_addr;
+	unsigned long feature_addr;
+	unsigned long nsect_addr;
+	unsigned long lbal_addr;
+	unsigned long lbam_addr;
+	unsigned long lbah_addr;
+	unsigned long device_addr;
+	unsigned long status_addr;
+	unsigned long command_addr;
+	unsigned long altstatus_addr;
+	unsigned long ctl_addr;
+	unsigned long bmdma_addr;
+	unsigned long scr_addr;
+};
+
+struct sata_port {
+	unsigned char port_no;	/*primary-0, secondary=1 */
+	struct sata_ioports ioaddr;	/*ATA cmd/ctl/dma reg blks */
+	unsigned char ctl_reg;
+	unsigned char last_ctl;
+	unsigned char port_state;	/*1-port is present and 
+					   0-port is not available */
+	unsigned char dev_mask;
+};
+
+/***********SATA LIBRARY SPECIFIC DEFINITIONS AND DECLARATIONS**************/
+#ifdef SATA_DECL		/*SATA library specific declarations */
+#define ata_id_has_lba48(id)    ((id)[83] & (1 << 10))
+#define ata_id_has_lba(id)      ((id)[49] & (1 << 9))
+#define ata_id_has_dma(id)      ((id)[49] & (1 << 8))
+#define ata_id_u32(id,n)        \
+	(((u32) (id)[(n) + 1] << 16) | ((u32) (id)[(n)]))
+#define ata_id_u64(id,n)        \
+	(((u64) (id)[(n) + 3] << 48) | \
+	((u64) (id)[(n) + 2] << 32) | \
+	((u64) (id)[(n) + 1] << 16) | \
+	((u64) (id)[(n) + 0]) )
+#endif
+
+#ifdef SATA_DECL		/*SATA library specific declarations */
+static inline void
+ata_dump_id (u16 * id)
+{
+	PRINTF ("49==0x%04x  "
+		"53==0x%04x  "
+		"63==0x%04x  "
+		"64==0x%04x  "
+		"75==0x%04x  \n", id[49], id[53], id[63], id[64], id[75]);
+	PRINTF ("80==0x%04x  "
+		"81==0x%04x  "
+		"82==0x%04x  "
+		"83==0x%04x  "
+		"84==0x%04x  \n", id[80], id[81], id[82], id[83], id[84]);
+	PRINTF ("88==0x%04x  " "93==0x%04x\n", id[88], id[93]);
+}
+#endif
+
+#ifdef SATA_DECL		/*SATA library specific declarations */
+int sata_bus_softreset (int num);
+void sata_identify (int num, int dev);
+void sata_port (struct sata_ioports *ioport);
+void set_Feature_cmd (int num, int dev);
+int sata_devchk (struct sata_ioports *ioaddr, int dev);
+void dev_select (struct sata_ioports *ioaddr, int dev);
+u8 sata_busy_wait (struct sata_ioports *ioaddr, int bits, unsigned int max);
+u8 sata_chk_status (struct sata_ioports *ioaddr);
+ulong sata_read (int device, lbaint_t blknr, ulong blkcnt, ulong * buffer);
+ulong sata_write (int device, lbaint_t blknr, ulong blkcnt, ulong * buffer);
+void msleep (int count);
+#else
+extern int sata_bus_softreset (int num);
+extern void sata_identify (int num, int dev);
+extern void sata_port (struct sata_ioports *ioport);
+extern void set_Feature_cmd (int num, int dev);
+extern ulong sata_read (int device, lbaint_t blknr,
+			ulong blkcnt, ulong * buffer);
+extern ulong sata_write (int device, lbaint_t blknr,
+			 ulong blkcnt, ulong * buffer);
+extern void msleep (int count);
+#endif
+
+/************DRIVER SPECIFIC DEFINITIONS AND DECLARATIONS**************/
+
+#ifdef DRV_DECL			/*Driver specific declaration */
+int init_sata (void);
+#else
+extern int init_sata (void);
+#endif
+
+#ifdef DRV_DECL			/*Defines Driver Specific variables */
+struct sata_port port[CFG_SATA_MAXBUS];
+block_dev_desc_t sata_dev_desc[CFG_SATA_MAXDEVICES];
+int curr_dev = -1;
+#else
+extern struct sata_port port[CFG_SATA_MAXBUS];
+extern block_dev_desc_t sata_dev_desc[CFG_SATA_MAXDEVICES];
+extern int curr_dev;
+#endif