his patch adds VT6421 PATA support to sata_via.
If we don't want to enable PATA support, nothing is changed in sata_via
driver:
<M> VIA SATA support
[ ] VT6421 PATA support (HIGHLY EXPERIMENTAL)
The patch is based on the patch from VIA, it applies to 2.6.19.
--
Tomasz Chmielewski
http://wpkg.org
diff -uprN a/drivers/ata/Kconfig b/drivers/ata/Kconfig
--- a/drivers/ata/Kconfig 2006-11-29 22:57:37.000000000 +0100
+++ b/drivers/ata/Kconfig 2006-12-04 14:37:09.000000000 +0100
@@ -135,6 +135,14 @@ config SATA_VIA
If unsure, say N.
+config PATA_VT6421
+ bool "VIA VT6421 PATA support (HIGHLY EXPERIMENTAL)"
+ depends on SATA_VIA
+ help
+ This option enables support for PATA on VIA VT6421 chips.
+
+ If unsure, say N.
+
config SATA_VITESSE
tristate "VITESSE VSC-7174 / INTEL 31244 SATA support"
depends on PCI
diff -uprN a/drivers/ata/sata_via.c b/drivers/ata/sata_via.c
--- a/drivers/ata/sata_via.c 2006-11-29 22:57:37.000000000 +0100
+++ b/drivers/ata/sata_via.c 2006-12-04 14:41:36.000000000 +0100
@@ -3,7 +3,7 @@
*
* Maintained by: Jeff Garzik <jgarzik@xxxxxxxxx>
* Please ALWAYS copy linux-ide@xxxxxxxxxxxxxxx
- on emails.
+ * on emails.
*
* Copyright 2003-2004 Red Hat, Inc. All rights reserved.
* Copyright 2003-2004 Jeff Garzik
@@ -29,10 +29,6 @@
*
* Hardware documentation available under NDA.
*
- *
- * To-do list:
- * - VT6421 PATA support
- *
*/
#include <linux/kernel.h>
@@ -63,7 +59,12 @@ enum {
PORT0 = (1 << 1),
PORT1 = (1 << 0),
ALL_PORTS = PORT0 | PORT1,
+
+#ifndef CONFIG_PATA_VT6421
N_PORTS = 2,
+#else
+ N_PORTS = 3,
+#endif
NATIVE_MODE_ALL = (1 << 7) | (1 << 6) | (1 << 5) | (1 << 4),
@@ -109,6 +110,12 @@ static struct scsi_host_template svia_sh
.bios_param = ata_std_bios_param,
};
+#ifdef CONFIG_PATA_VT6421
+static void via_pata_phy_reset(struct ata_port *ap);
+static void via_pata_set_piomode(struct ata_port *ap, struct ata_device *adev);
+static void via_pata_set_dmamode(struct ata_port *ap, struct ata_device *adev);
+#endif
+
static const struct ata_port_operations vt6420_sata_ops = {
.port_disable = ata_port_disable,
@@ -143,6 +150,11 @@ static const struct ata_port_operations
static const struct ata_port_operations vt6421_sata_ops = {
.port_disable = ata_port_disable,
+#ifdef CONFIG_PATA_VT6421
+ .set_piomode = via_pata_set_piomode,
+ .set_dmamode = via_pata_set_dmamode,
+#endif
+
.tf_load = ata_tf_load,
.tf_read = ata_tf_read,
.check_status = ata_check_status,
@@ -154,6 +166,10 @@ static const struct ata_port_operations
.bmdma_stop = ata_bmdma_stop,
.bmdma_status = ata_bmdma_status,
+#ifdef CONFIG_PATA_VT6421
+ .phy_reset = via_pata_phy_reset,
+#endif
+
.qc_prep = ata_qc_prep,
.qc_issue = ata_qc_issue_prot,
.data_xfer = ata_pio_data_xfer,
@@ -166,8 +182,10 @@ static const struct ata_port_operations
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
+#ifndef CONFIG_PATA_VT6421
.scr_read = svia_scr_read,
.scr_write = svia_scr_write,
+#endif
.port_start = ata_port_start,
.port_stop = ata_port_stop,
@@ -237,6 +255,7 @@ static int vt6420_prereset(struct ata_po
* __sata_phy_reset().
*/
svia_scr_write(ap, SCR_CONTROL, 0x300);
+
svia_scr_read(ap, SCR_CONTROL); /* flush */
/* wait for phy to become ready, if necessary */
@@ -291,6 +310,7 @@ static unsigned long svia_scr_addr(unsig
return addr + (port * 128);
}
+
static unsigned long vt6421_scr_addr(unsigned long addr, unsigned int port)
{
return addr + (port * 64);
@@ -347,7 +367,14 @@ static struct ata_probe_ent *vt6421_init
INIT_LIST_HEAD(&probe_ent->node);
probe_ent->sht = &svia_sht;
+
+#ifndef CONFIG_PATA_VT6421
probe_ent->port_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY;
+#else
+ probe_ent->port_flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST |
+ ATA_FLAG_NO_LEGACY;
+#endif
+
probe_ent->port_ops = &vt6421_sata_ops;
probe_ent->n_ports = N_PORTS;
probe_ent->irq = pdev->irq;
@@ -362,6 +389,165 @@ static struct ata_probe_ent *vt6421_init
return probe_ent;
}
+#ifdef CONFIG_PATA_VT6421
+/* add functions for pata */
+
+/**
+ * via_pata_cbl_detect - Probe host controller cable detect info
+ * @ap: Port for which cable detect info is desired
+ *
+ * Read 80c cable indicator from ATA PCI device's PCI config
+ * register. This register is normally set by firmware (BIOS).
+ *
+ * LOCKING:
+ * None (inherited from caller).
+ */
+static void via_pata_cbl_detect(struct ata_port *ap)
+{
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ int cfg_addr;
+ u8 tmp;
+
+ if (ap->port_no == 2) { /* PATA channel in VT6421 */
+ ap->cbl = ATA_CBL_PATA80;
+ cfg_addr = 0xB3;
+ pci_read_config_byte(pdev, cfg_addr, &tmp);
+ if (tmp & 0x10) { /* 40pin cable */
+ ap->cbl = ATA_CBL_PATA40;
+ } else { /* 80pin cable */
+ ap->cbl = ATA_CBL_PATA80;
+ }
+ } else { /* channel 0 and 1 are SATA channels */
+ ap->cbl = ATA_CBL_SATA;
+ }
+
+ return;
+}
+
+/**
+ * via_pata_phy_reset - Probe specified port on PATA host controller
+ * @ap: Port to probe
+ *
+ * Probe PATA phy.
+ *
+ * LOCKING:
+ * None (inherited from caller).
+ */
+
+static void via_pata_phy_reset(struct ata_port *ap)
+{
+ via_pata_cbl_detect(ap);
+
+ ata_port_probe(ap);
+
+ ata_bus_reset(ap);
+}
+
+
+/**
+ * via_pata_set_piomode - Initialize host controller PATA PIO timings
+ * @ap: Port whose timings we are configuring
+ * @adev: um
+ * @pio: PIO mode, 0 - 4
+ *
+ * Set PIO mode for device, in host controller PCI config space.
+ *
+ * LOCKING:
+ * None (inherited from caller).
+ */
+
+static void via_pata_set_piomode (struct ata_port *ap, struct ata_device *adev)
+{
+ struct pci_dev *dev = to_pci_dev(ap->host->dev);
+
+ u8 cfg_byte;
+ int cfg_addr;
+
+ if (ap->port_no != 2) { /* SATA channel in VT6421 */
+ /* no need to set */
+ return;
+ }
+
+
+ cfg_addr = 0xAB;
+ switch (adev->pio_mode & 0x07) {
+ case 0:
+ cfg_byte = 0xa8;
+ break;
+ case 1:
+ cfg_byte = 0x65;
+ break;
+ case 2:
+ cfg_byte = 0x65;
+ break;
+ case 3:
+ cfg_byte = 0x31;
+ break;
+ case 4:
+ cfg_byte = 0x20;
+ break;
+ default:
+ cfg_byte = 0x20;
+ }
+
+ pci_write_config_byte (dev, cfg_addr, cfg_byte);
+}
+
+/**
+ * via_pata_set_dmamode - Initialize host controller PATA PIO timings
+ * @ap: Port whose timings we are configuring
+ * @adev: um
+ * @udma: udma mode, 0 - 6
+ *
+ * Set UDMA mode for device, in host controller PCI config space.
+ *
+ * LOCKING:
+ * None (inherited from caller).
+ */
+
+static void via_pata_set_dmamode (struct ata_port *ap, struct ata_device *adev)
+{
+ struct pci_dev *dev = to_pci_dev(ap->host->dev);
+
+ u8 cfg_byte;
+ int cfg_addr;
+
+ if (ap->port_no != 2) { /* SATA channel in VT6421 */
+ /* no need to set */
+ return;
+ }
+
+ cfg_addr = 0xB3;
+ switch (adev->dma_mode & 0x07) {
+ case 0:
+ cfg_byte = 0xee;
+ break;
+ case 1:
+ cfg_byte = 0xe8;
+ break;
+ case 2:
+ cfg_byte = 0xe6;
+ break;
+ case 3:
+ cfg_byte = 0xe4;
+ break;
+ case 4:
+ cfg_byte = 0xe2;
+ break;
+ case 5:
+ cfg_byte = 0xe1;
+ break;
+ case 6:
+ cfg_byte = 0xe0;
+ break;
+ default:
+ cfg_byte = 0xe0;
+ }
+
+ pci_write_config_byte (dev, cfg_addr, cfg_byte);
+}
+#endif
+
static void svia_configure(struct pci_dev *pdev)
{
u8 tmp8;
