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Message-ID: <20061204152105.6132a59c@localhost.localdomain>
Date: Mon, 4 Dec 2006 15:21:05 +0000
From: Alan <alan@...rguk.ukuu.org.uk>
To: Tomasz Chmielewski <mangoo@...g.org>
Cc: Linux IDE <linux-ide@...r.kernel.org>,
linux-kernel@...r.kernel.org, Jeff Garzik <jgarzik@...ox.com>
Subject: [PATCH]: via 6421 PATA support done in a rather cleaner fashion
Wants testing... so test and report
Signed-off-by: Alan Cox <alan@...hat.com>
--- linux.vanilla-2.6.19-rc6-mm1/drivers/ata/sata_via.c 2006-11-24 13:58:05.000000000 +0000
+++ linux-2.6.19-rc6-mm1/drivers/ata/sata_via.c 2006-12-04 14:57:34.719099648 +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 +78,10 @@
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_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 unsigned long vt6421_mode_filter(const struct ata_port *ap, struct ata_device *adev, unsigned long modes);
static const struct pci_device_id svia_pci_tbl[] = {
{ PCI_VDEVICE(VIA, 0x0591), vt6420 },
@@ -140,8 +147,12 @@
.host_stop = ata_host_stop,
};
-static const struct ata_port_operations vt6421_sata_ops = {
+static const struct ata_port_operations vt6421_ata_ops = {
.port_disable = ata_port_disable,
+
+ .set_piomode = vt6421_set_pio_mode,
+ .set_dmamode = vt6421_set_dma_mode,
+ .mode_filter = vt6421_mode_filter,
.tf_load = ata_tf_load,
.tf_read = ata_tf_read,
@@ -160,7 +171,7 @@
.freeze = ata_bmdma_freeze,
.thaw = ata_bmdma_thaw,
- .error_handler = ata_bmdma_error_handler,
+ .error_handler = vt6421_error_handler,
.post_internal_cmd = ata_bmdma_post_internal_cmd,
.irq_handler = ata_interrupt,
@@ -278,6 +289,55 @@
NULL, ata_std_postreset);
}
+static int vt6421_prereset(struct ata_port *ap)
+{
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ u8 tmp;
+
+ if (ap->port_no != PATA_PORT) {
+ ap->cbl = ATA_CBL_SATA;
+ return 0;
+ }
+ 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_error_handler(struct ata_port *ap)
+{
+ return ata_bmdma_drive_eh(ap, vt6421_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 };
+ if (ap->port_no == PATA_PORT)
+ 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 };
+ if (ap->port_no == PATA_PORT)
+ pci_write_config_byte(pdev, PATA_UDMA_TIMING, udma_bits[adev->pio_mode - XFER_UDMA_0]);
+}
+
+static unsigned long vt6421_mode_filter(const struct ata_port *ap, struct ata_device *adev, unsigned long modes)
+{
+ if(ap->port_no == PATA_PORT) {
+ modes &= ~ATA_MASK_MWDMA; /* No MWDMA support */
+ modes &= ~ (0x40 << ATA_SHIFT_UDMA); /* UDMA 133 limited */
+ }
+ return modes;
+}
+
static const unsigned int svia_bar_sizes[] = {
8, 4, 8, 4, 16, 256
};
@@ -348,7 +408,7 @@
probe_ent->sht = &svia_sht;
probe_ent->port_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY;
- probe_ent->port_ops = &vt6421_sata_ops;
+ probe_ent->port_ops = &vt6421_ata_ops;
probe_ent->n_ports = N_PORTS;
probe_ent->irq = pdev->irq;
probe_ent->irq_flags = IRQF_SHARED;
@@ -500,4 +560,3 @@
module_init(svia_init);
module_exit(svia_exit);
-
-
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