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, 216 insertions, 0 deletions

diff --git a/drivers/ata_piix.c b/drivers/ata_piix.c
new file mode 100644
index 0000000..7e61163
--- /dev/null
+++ b/drivers/ata_piix.c
@@ -0,0 +1,216 @@
+/*
+  * Copyright (C) Procsys. All rights reserved.
+  * Author: Mushtaq Khan <mushtaq_k@procsys.com>
+                        <mushtaqk_921@yahoo.co.in>
+  *
+  * This program is free software; you can redistribute it and/or
+  * modify it under the terms of the GNU General Public License as
+  * published by the Free Software Foundation; either version 2 of
+  * the License, or (at your option) any later version.
+  *
+  * This program is distributed in the hope that it will be useful,
+  * but WITHOUT ANY WARRANTY; without even the implied warranty of
+  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  * GNU General Public License for more details.
+  *
+  * You should have received a copy of the GNU General Public License
+  * along with this program; if not, write to the Free Software
+  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+  * MA 02111-1307 USA
+  *
+  * with the reference to ata_piix driver in kernel 2.4.32
+*/
+
+/*
+This file contains SATA controller and SATA drive initialization functions
+*/
+
+#include <common.h>
+#include <pci.h>
+#include <command.h>
+#include <config.h>
+#include <asm/byteorder.h>
+#include <ide.h>
+#include <ata.h>
+
+#ifdef CFG_ATA_PIIX		/*ata_piix driver */
+
+#define DEBUG_SATA 0		/*For debug prints set DEBUG_SATA to 1 */
+
+#define DRV_DECL		/*For file specific declarations */
+#include <sata.h>
+#undef DRV_DECL
+
+/*Macros realted to PCI*/
+#define PCI_SATA_BUS	0x00
+#define PCI_SATA_DEV	0x1f
+#define PCI_SATA_FUNC	0x02
+
+#define PCI_SATA_BASE1 0x10
+#define PCI_SATA_BASE2 0x14
+#define PCI_SATA_BASE3 0x18
+#define PCI_SATA_BASE4 0x1c
+#define PCI_SATA_BASE5 0x20
+#define PCI_PMR         0x90
+#define PCI_PI          0x09
+#define PCI_PCS         0x92
+#define PCI_DMA_CTL     0x48
+
+#define PORT_PRESENT (1<<0)
+#define PORT_ENABLED (1<<4)
+
+u32 bdf;
+u32 iobase1 = 0;		/*Primary cmd block */
+u32 iobase2 = 0;		/*Primary ctl block */
+u32 iobase3 = 0;		/*Sec cmd block */
+u32 iobase4 = 0;		/*sec ctl block */
+u32 iobase5 = 0;		/*BMDMA*/
+int
+pci_sata_init (void)
+{
+	u32 bus = PCI_SATA_BUS;
+	u32 dev = PCI_SATA_DEV;
+	u32 fun = PCI_SATA_FUNC;
+	u16 cmd = 0;
+	u8 lat = 0, pcibios_max_latency = 0xff;
+	u8 pmr;			/*Port mapping reg */
+	u8 pi;			/*Prgming Interface reg */
+
+	bdf = PCI_BDF (bus, dev, fun);
+	pci_read_config_dword (bdf, PCI_SATA_BASE1, &iobase1);
+	pci_read_config_dword (bdf, PCI_SATA_BASE2, &iobase2);
+	pci_read_config_dword (bdf, PCI_SATA_BASE3, &iobase3);
+	pci_read_config_dword (bdf, PCI_SATA_BASE4, &iobase4);
+	pci_read_config_dword (bdf, PCI_SATA_BASE5, &iobase5);
+
+	if ((iobase1 == 0xFFFFFFFF) || (iobase2 == 0xFFFFFFFF) ||
+	    (iobase3 == 0xFFFFFFFF) || (iobase4 == 0xFFFFFFFF) ||
+	    (iobase5 == 0xFFFFFFFF)) {
+		printf ("error no base addr for SATA controller\n");
+		return 1;
+	 /*ERROR*/}
+
+	iobase1 &= 0xFFFFFFFE;
+	iobase2 &= 0xFFFFFFFE;
+	iobase3 &= 0xFFFFFFFE;
+	iobase4 &= 0xFFFFFFFE;
+	iobase5 &= 0xFFFFFFFE;
+
+	/*check for mode */
+	pci_read_config_byte (bdf, PCI_PMR, &pmr);
+	if (pmr > 1) {
+		printf ("combined mode not supported\n");
+		return 1;
+	}
+
+	pci_read_config_byte (bdf, PCI_PI, &pi);
+	if ((pi & 0x05) != 0x05) {
+		printf ("Sata is in Legacy mode\n");
+		return 1;
+	} else {
+		printf ("sata is in Native mode\n");
+	}
+
+	/*MASTER CFG AND IO CFG */
+	pci_read_config_word (bdf, PCI_COMMAND, &cmd);
+	cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_IO;
+	pci_write_config_word (bdf, PCI_COMMAND, cmd);
+	pci_read_config_byte (dev, PCI_LATENCY_TIMER, &lat);
+
+	if (lat < 16)
+		lat = (64 <= pcibios_max_latency) ? 64 : pcibios_max_latency;
+	else if (lat > pcibios_max_latency)
+		lat = pcibios_max_latency;
+	pci_write_config_byte (dev, PCI_LATENCY_TIMER, lat);
+
+	return 0;
+}
+
+int
+sata_bus_probe (int port_no)
+{
+	int orig_mask, mask;
+	u16 pcs;
+
+	mask = (PORT_PRESENT << port_no);
+	pci_read_config_word (bdf, PCI_PCS, &pcs);
+	orig_mask = (int) pcs & 0xff;
+	if ((orig_mask & mask) != mask)
+		return 0;
+	else
+		return 1;
+}
+
+int
+init_sata (void)
+{
+	u8 i, rv = 0;
+
+	for (i = 0; i < CFG_SATA_MAXDEVICES; i++) {
+		sata_dev_desc[i].type = DEV_TYPE_UNKNOWN;
+		sata_dev_desc[i].if_type = IF_TYPE_IDE;
+		sata_dev_desc[i].dev = i;
+		sata_dev_desc[i].part_type = PART_TYPE_UNKNOWN;
+		sata_dev_desc[i].blksz = 0;
+		sata_dev_desc[i].lba = 0;
+		sata_dev_desc[i].block_read = sata_read;
+	}
+
+	rv = pci_sata_init ();
+	if (rv == 1) {
+		printf ("pci initialization failed\n");
+		return 1;
+	}
+
+	port[0].port_no = 0;
+	port[0].ioaddr.cmd_addr = iobase1;
+	port[0].ioaddr.altstatus_addr = port[0].ioaddr.ctl_addr =
+	    iobase2 | ATA_PCI_CTL_OFS;
+	port[0].ioaddr.bmdma_addr = iobase5;
+
+	port[1].port_no = 1;
+	port[1].ioaddr.cmd_addr = iobase3;
+	port[1].ioaddr.altstatus_addr = port[1].ioaddr.ctl_addr =
+	    iobase4 | ATA_PCI_CTL_OFS;
+	port[1].ioaddr.bmdma_addr = iobase5 + 0x8;
+
+	for (i = 0; i < CFG_SATA_MAXBUS; i++)
+		sata_port (&port[i].ioaddr);
+
+	for (i = 0; i < CFG_SATA_MAXBUS; i++) {
+		if (!(sata_bus_probe (i))) {
+			port[i].port_state = 0;
+			printf ("SATA#%d port is not present \n", i);
+		} else {
+			printf ("SATA#%d port is present\n", i);
+			if (sata_bus_softreset (i)) {
+				port[i].port_state = 0;
+			} else {
+				port[i].port_state = 1;
+			}
+		}
+	}
+
+	for (i = 0; i < CFG_SATA_MAXBUS; i++) {
+		u8 j, devno;
+
+		if (port[i].port_state == 0)
+			continue;
+		for (j = 0; j < CFG_SATA_DEVS_PER_BUS; j++) {
+			sata_identify (i, j);
+			set_Feature_cmd (i, j);
+			devno = i * CFG_SATA_DEVS_PER_BUS + j;
+			if ((sata_dev_desc[devno].lba > 0) &&
+			    (sata_dev_desc[devno].blksz > 0)) {
+				dev_print (&sata_dev_desc[devno]);
+				/* initialize partition type */
+				init_part (&sata_dev_desc[devno]);
+				if (curr_dev < 0)
+					curr_dev =
+					    i * CFG_SATA_DEVS_PER_BUS + j;
+			}
+		}
+	}
+	return 0;
+}
+#endif