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Message-ID: <20070108171113.6c5d7985@localhost.localdomain>
Date: Mon, 8 Jan 2007 17:11:13 +0000
From: Alan <alan@...rguk.ukuu.org.uk>
To: Jeff Garzik <jgarzik@...ox.com>
Cc: akpm@...l.org, torvalds@...l.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sata_via: PATA support, resubmit
> > Signed-off-by: Alan Cox <alan@...hat.com>
>
> Looks good to me, modulo minor comments below...
New revision below
Signed-off-by: Alan Cox <alan@...hat.com>
diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.20-rc3-mm1/drivers/ata/sata_via.c linux-2.6.20-rc3-mm1/drivers/ata/sata_via.c
--- linux.vanilla-2.6.20-rc3-mm1/drivers/ata/sata_via.c 2007-01-05 13:09:36.000000000 +0000
+++ linux-2.6.20-rc3-mm1/drivers/ata/sata_via.c 2007-01-08 16:42:44.629970272 +0000
@@ -59,11 +59,14 @@
SATA_INT_GATE = 0x41, /* SATA interrupt gating */
SATA_NATIVE_MODE = 0x42, /* Native mode enable */
SATA_PATA_SHARING = 0x49, /* PATA/SATA sharing func ctrl */
-
+ PATA_UDMA_TIMING = 0xB3, /* PATA timing for DMA/ cable detect */
+ PATA_PIO_TIMING = 0xAB, /* PATA timing register */
+
PORT0 = (1 << 1),
PORT1 = (1 << 0),
ALL_PORTS = PORT0 | PORT1,
- N_PORTS = 2,
+ PATA_PORT = 2, /* PATA is port 2 */
+ N_PORTS = 3,
NATIVE_MODE_ALL = (1 << 7) | (1 << 6) | (1 << 5) | (1 << 4),
@@ -75,6 +78,11 @@
static u32 svia_scr_read (struct ata_port *ap, unsigned int sc_reg);
static void svia_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
static void vt6420_error_handler(struct ata_port *ap);
+static void vt6421_sata_error_handler(struct ata_port *ap);
+static void vt6421_pata_error_handler(struct ata_port *ap);
+static void vt6421_set_pio_mode(struct ata_port *ap, struct ata_device *adev);
+static void vt6421_set_dma_mode(struct ata_port *ap, struct ata_device *adev);
+static int vt6421_port_start(struct ata_port *ap);
static const struct pci_device_id svia_pci_tbl[] = {
{ PCI_VDEVICE(VIA, 0x0591), vt6420 },
@@ -140,9 +148,43 @@
.host_stop = ata_host_stop,
};
-static const struct ata_port_operations vt6421_sata_ops = {
+static const struct ata_port_operations vt6421_pata_ops = {
.port_disable = ata_port_disable,
+
+ .set_piomode = vt6421_set_pio_mode,
+ .set_dmamode = vt6421_set_dma_mode,
+
+ .tf_load = ata_tf_load,
+ .tf_read = ata_tf_read,
+ .check_status = ata_check_status,
+ .exec_command = ata_exec_command,
+ .dev_select = ata_std_dev_select,
+
+ .bmdma_setup = ata_bmdma_setup,
+ .bmdma_start = ata_bmdma_start,
+ .bmdma_stop = ata_bmdma_stop,
+ .bmdma_status = ata_bmdma_status,
+
+ .qc_prep = ata_qc_prep,
+ .qc_issue = ata_qc_issue_prot,
+ .data_xfer = ata_pio_data_xfer,
+
+ .freeze = ata_bmdma_freeze,
+ .thaw = ata_bmdma_thaw,
+ .error_handler = vt6421_pata_error_handler,
+ .post_internal_cmd = ata_bmdma_post_internal_cmd,
+ .irq_handler = ata_interrupt,
+ .irq_clear = ata_bmdma_irq_clear,
+
+ .port_start = vt6421_port_start,
+ .port_stop = ata_port_stop,
+ .host_stop = ata_host_stop,
+};
+
+static const struct ata_port_operations vt6421_sata_ops = {
+ .port_disable = ata_port_disable,
+
.tf_load = ata_tf_load,
.tf_read = ata_tf_read,
.check_status = ata_check_status,
@@ -160,7 +202,7 @@
.freeze = ata_bmdma_freeze,
.thaw = ata_bmdma_thaw,
- .error_handler = ata_bmdma_error_handler,
+ .error_handler = vt6421_sata_error_handler,
.post_internal_cmd = ata_bmdma_post_internal_cmd,
.irq_handler = ata_interrupt,
@@ -169,7 +211,7 @@
.scr_read = svia_scr_read,
.scr_write = svia_scr_write,
- .port_start = ata_port_start,
+ .port_start = vt6421_port_start,
.port_stop = ata_port_stop,
.host_stop = ata_host_stop,
};
@@ -278,6 +320,61 @@
NULL, ata_std_postreset);
}
+static int vt6421_pata_prereset(struct ata_port *ap)
+{
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ u8 tmp;
+
+ pci_read_config_byte(pdev, PATA_UDMA_TIMING, &tmp);
+ if (tmp & 0x10)
+ ap->cbl = ATA_CBL_PATA40;
+ else
+ ap->cbl = ATA_CBL_PATA80;
+ return 0;
+}
+
+static void vt6421_pata_error_handler(struct ata_port *ap)
+{
+ return ata_bmdma_drive_eh(ap, vt6421_pata_prereset, ata_std_softreset,
+ NULL, ata_std_postreset);
+}
+
+static int vt6421_sata_prereset(struct ata_port *ap)
+{
+ ap->cbl = ATA_CBL_SATA;
+ return 0;
+}
+
+static void vt6421_sata_error_handler(struct ata_port *ap)
+{
+ return ata_bmdma_drive_eh(ap, vt6421_sata_prereset, ata_std_softreset,
+ NULL, ata_std_postreset);
+}
+
+static void vt6421_set_pio_mode(struct ata_port *ap, struct ata_device *adev)
+{
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ static const u8 pio_bits[] = { 0xA8, 0x65, 0x65, 0x31, 0x20 };
+ pci_write_config_byte(pdev, PATA_PIO_TIMING, pio_bits[adev->pio_mode - XFER_PIO_0]);
+}
+
+static void vt6421_set_dma_mode(struct ata_port *ap, struct ata_device *adev)
+{
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ static const u8 udma_bits[] = { 0xEE, 0xE8, 0xE6, 0xE4, 0xE2, 0xE1, 0xE0, 0xE0 };
+ pci_write_config_byte(pdev, PATA_UDMA_TIMING, udma_bits[adev->pio_mode - XFER_UDMA_0]);
+}
+
+static int vt6421_port_start(struct ata_port *ap)
+{
+ if (ap->port_no == PATA_PORT) {
+ ap->ops = &vt6421_pata_ops;
+ ap->mwdma_mask = 0;
+ ap->flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_NO_LEGACY | ATA_FLAG_SRST;
+ }
+ return ata_port_start(ap);
+}
+
static const unsigned int svia_bar_sizes[] = {
8, 4, 8, 4, 16, 256
};
@@ -500,4 +597,3 @@
module_init(svia_init);
module_exit(svia_exit);
-
-
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