linux/drivers/ata/pata_artop.c

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/*
* pata_artop.c - ARTOP ATA controller driver
*
* (C) 2006 Red Hat
* (C) 2007 Bartlomiej Zolnierkiewicz
*
* Based in part on drivers/ide/pci/aec62xx.c
* Copyright (C) 1999-2002 Andre Hedrick <andre@linux-ide.org>
* 865/865R fixes for Macintosh card version from a patch to the old
* driver by Thibaut VARENE <varenet@parisc-linux.org>
* When setting the PCI latency we must set 0x80 or higher for burst
* performance Alessandro Zummo <alessandro.zummo@towertech.it>
*
* TODO
* 850 serialization once the core supports it
* Investigate no_dsc on 850R
* Clock detect
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <scsi/scsi_host.h>
#include <linux/libata.h>
#include <linux/ata.h>
#define DRV_NAME "pata_artop"
#define DRV_VERSION "0.4.4"
/*
* The ARTOP has 33 Mhz and "over clocked" timing tables. Until we
* get PCI bus speed functionality we leave this as 0. Its a variable
* for when we get the functionality and also for folks wanting to
* test stuff.
*/
static int clock = 0;
static int artop6210_pre_reset(struct ata_link *link, unsigned long deadline)
{
struct ata_port *ap = link->ap;
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
const struct pci_bits artop_enable_bits[] = {
{ 0x4AU, 1U, 0x02UL, 0x02UL }, /* port 0 */
{ 0x4AU, 1U, 0x04UL, 0x04UL }, /* port 1 */
};
if (!pci_test_config_bits(pdev, &artop_enable_bits[ap->port_no]))
return -ENOENT;
libata: add deadline support to prereset and reset methods Add @deadline to prereset and reset methods and make them honor it. ata_wait_ready() which directly takes @deadline is implemented to be used as the wait function. This patch is in preparation for EH timing improvements. * ata_wait_ready() never does busy sleep. It's only used from EH and no wait in EH is that urgent. This function also prints 'be patient' message automatically after 5 secs of waiting if more than 3 secs is remaining till deadline. * ata_bus_post_reset() now fails with error code if any of its wait fails. This is important because earlier reset tries will have shorter timeout than the spec requires. If a device fails to respond before the short timeout, reset should be retried with longer timeout rather than silently ignoring the device. There are three behavior differences. 1. Timeout is applied to both devices at once, not separately. This is more consistent with what the spec says. 2. When a device passes devchk but fails to become ready before deadline. Previouly, post_reset would just succeed and let device classification remove the device. New code fails the reset thus causing reset retry. After a few times, EH will give up disabling the port. 3. When slave device passes devchk but fails to become accessible (TF-wise) after reset. Original code disables dev1 after 30s timeout and continues as if the device doesn't exist, while the patched code fails reset. When this happens, new code fails reset on whole port rather than proceeding with only the primary device. If the failing device is suffering transient problems, new code retries reset which is a better behavior. If the failing device is actually broken, the net effect is identical to it, but not to the other device sharing the channel. In the previous code, reset would have succeeded after 30s thus detecting the working one. In the new code, reset fails and whole port gets disabled. IMO, it's a pathological case anyway (broken device sharing bus with working one) and doesn't really matter. * ata_bus_softreset() is changed to return error code from ata_bus_post_reset(). It used to return 0 unconditionally. * Spin up waiting is to be removed and not converted to honor deadline. * To be on the safe side, deadline is set to 40s for the time being. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-02-02 07:50:52 +00:00
return ata_sff_prereset(link, deadline);
}
/**
* artop6260_pre_reset - check for 40/80 pin
* @link: link
libata: add deadline support to prereset and reset methods Add @deadline to prereset and reset methods and make them honor it. ata_wait_ready() which directly takes @deadline is implemented to be used as the wait function. This patch is in preparation for EH timing improvements. * ata_wait_ready() never does busy sleep. It's only used from EH and no wait in EH is that urgent. This function also prints 'be patient' message automatically after 5 secs of waiting if more than 3 secs is remaining till deadline. * ata_bus_post_reset() now fails with error code if any of its wait fails. This is important because earlier reset tries will have shorter timeout than the spec requires. If a device fails to respond before the short timeout, reset should be retried with longer timeout rather than silently ignoring the device. There are three behavior differences. 1. Timeout is applied to both devices at once, not separately. This is more consistent with what the spec says. 2. When a device passes devchk but fails to become ready before deadline. Previouly, post_reset would just succeed and let device classification remove the device. New code fails the reset thus causing reset retry. After a few times, EH will give up disabling the port. 3. When slave device passes devchk but fails to become accessible (TF-wise) after reset. Original code disables dev1 after 30s timeout and continues as if the device doesn't exist, while the patched code fails reset. When this happens, new code fails reset on whole port rather than proceeding with only the primary device. If the failing device is suffering transient problems, new code retries reset which is a better behavior. If the failing device is actually broken, the net effect is identical to it, but not to the other device sharing the channel. In the previous code, reset would have succeeded after 30s thus detecting the working one. In the new code, reset fails and whole port gets disabled. IMO, it's a pathological case anyway (broken device sharing bus with working one) and doesn't really matter. * ata_bus_softreset() is changed to return error code from ata_bus_post_reset(). It used to return 0 unconditionally. * Spin up waiting is to be removed and not converted to honor deadline. * To be on the safe side, deadline is set to 40s for the time being. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-02-02 07:50:52 +00:00
* @deadline: deadline jiffies for the operation
*
* The ARTOP hardware reports the cable detect bits in register 0x49.
* Nothing complicated needed here.
*/
static int artop6260_pre_reset(struct ata_link *link, unsigned long deadline)
{
static const struct pci_bits artop_enable_bits[] = {
{ 0x4AU, 1U, 0x02UL, 0x02UL }, /* port 0 */
{ 0x4AU, 1U, 0x04UL, 0x04UL }, /* port 1 */
};
struct ata_port *ap = link->ap;
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
/* Odd numbered device ids are the units with enable bits (the -R cards) */
if (pdev->device % 1 && !pci_test_config_bits(pdev, &artop_enable_bits[ap->port_no]))
return -ENOENT;
return ata_sff_prereset(link, deadline);
}
/**
* artop6260_cable_detect - identify cable type
* @ap: Port
*
* Identify the cable type for the ARTOP interface in question
*/
static int artop6260_cable_detect(struct ata_port *ap)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
u8 tmp;
pci_read_config_byte(pdev, 0x49, &tmp);
if (tmp & (1 << ap->port_no))
return ATA_CBL_PATA40;
return ATA_CBL_PATA80;
}
/**
* artop6210_load_piomode - Load a set of PATA PIO timings
* @ap: Port whose timings we are configuring
* @adev: Device
* @pio: PIO mode
*
* Set PIO mode for device, in host controller PCI config space. This
* is used both to set PIO timings in PIO mode and also to set the
* matching PIO clocking for UDMA, as well as the MWDMA timings.
*
* LOCKING:
* None (inherited from caller).
*/
static void artop6210_load_piomode(struct ata_port *ap, struct ata_device *adev, unsigned int pio)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
int dn = adev->devno + 2 * ap->port_no;
const u16 timing[2][5] = {
{ 0x0000, 0x000A, 0x0008, 0x0303, 0x0301 },
{ 0x0700, 0x070A, 0x0708, 0x0403, 0x0401 }
};
/* Load the PIO timing active/recovery bits */
pci_write_config_word(pdev, 0x40 + 2 * dn, timing[clock][pio]);
}
/**
* artop6210_set_piomode - Initialize host controller PATA PIO timings
* @ap: Port whose timings we are configuring
* @adev: Device we are configuring
*
* Set PIO mode for device, in host controller PCI config space. For
* ARTOP we must also clear the UDMA bits if we are not doing UDMA. In
* the event UDMA is used the later call to set_dmamode will set the
* bits as required.
*
* LOCKING:
* None (inherited from caller).
*/
static void artop6210_set_piomode(struct ata_port *ap, struct ata_device *adev)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
int dn = adev->devno + 2 * ap->port_no;
u8 ultra;
artop6210_load_piomode(ap, adev, adev->pio_mode - XFER_PIO_0);
/* Clear the UDMA mode bits (set_dmamode will redo this if needed) */
pci_read_config_byte(pdev, 0x54, &ultra);
ultra &= ~(3 << (2 * dn));
pci_write_config_byte(pdev, 0x54, ultra);
}
/**
* artop6260_load_piomode - Initialize host controller PATA PIO timings
* @ap: Port whose timings we are configuring
* @adev: Device we are configuring
* @pio: PIO mode
*
* Set PIO mode for device, in host controller PCI config space. The
* ARTOP6260 and relatives store the timing data differently.
*
* LOCKING:
* None (inherited from caller).
*/
static void artop6260_load_piomode (struct ata_port *ap, struct ata_device *adev, unsigned int pio)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
int dn = adev->devno + 2 * ap->port_no;
const u8 timing[2][5] = {
{ 0x00, 0x0A, 0x08, 0x33, 0x31 },
{ 0x70, 0x7A, 0x78, 0x43, 0x41 }
};
/* Load the PIO timing active/recovery bits */
pci_write_config_byte(pdev, 0x40 + dn, timing[clock][pio]);
}
/**
* artop6260_set_piomode - Initialize host controller PATA PIO timings
* @ap: Port whose timings we are configuring
* @adev: Device we are configuring
*
* Set PIO mode for device, in host controller PCI config space. For
* ARTOP we must also clear the UDMA bits if we are not doing UDMA. In
* the event UDMA is used the later call to set_dmamode will set the
* bits as required.
*
* LOCKING:
* None (inherited from caller).
*/
static void artop6260_set_piomode(struct ata_port *ap, struct ata_device *adev)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
u8 ultra;
artop6260_load_piomode(ap, adev, adev->pio_mode - XFER_PIO_0);
/* Clear the UDMA mode bits (set_dmamode will redo this if needed) */
pci_read_config_byte(pdev, 0x44 + ap->port_no, &ultra);
ultra &= ~(7 << (4 * adev->devno)); /* One nibble per drive */
pci_write_config_byte(pdev, 0x44 + ap->port_no, ultra);
}
/**
* artop6210_set_dmamode - Initialize host controller PATA PIO timings
* @ap: Port whose timings we are configuring
* @adev: Device whose timings we are configuring
*
* Set DMA mode for device, in host controller PCI config space.
*
* LOCKING:
* None (inherited from caller).
*/
static void artop6210_set_dmamode (struct ata_port *ap, struct ata_device *adev)
{
unsigned int pio;
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
int dn = adev->devno + 2 * ap->port_no;
u8 ultra;
if (adev->dma_mode == XFER_MW_DMA_0)
pio = 1;
else
pio = 4;
/* Load the PIO timing active/recovery bits */
artop6210_load_piomode(ap, adev, pio);
pci_read_config_byte(pdev, 0x54, &ultra);
ultra &= ~(3 << (2 * dn));
/* Add ultra DMA bits if in UDMA mode */
if (adev->dma_mode >= XFER_UDMA_0) {
u8 mode = (adev->dma_mode - XFER_UDMA_0) + 1 - clock;
if (mode == 0)
mode = 1;
ultra |= (mode << (2 * dn));
}
pci_write_config_byte(pdev, 0x54, ultra);
}
/**
* artop6260_set_dmamode - Initialize host controller PATA PIO timings
* @ap: Port whose timings we are configuring
* @adev: Device we are configuring
*
* Set DMA mode for device, in host controller PCI config space. The
* ARTOP6260 and relatives store the timing data differently.
*
* LOCKING:
* None (inherited from caller).
*/
static void artop6260_set_dmamode (struct ata_port *ap, struct ata_device *adev)
{
unsigned int pio = adev->pio_mode - XFER_PIO_0;
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
u8 ultra;
if (adev->dma_mode == XFER_MW_DMA_0)
pio = 1;
else
pio = 4;
/* Load the PIO timing active/recovery bits */
artop6260_load_piomode(ap, adev, pio);
/* Add ultra DMA bits if in UDMA mode */
pci_read_config_byte(pdev, 0x44 + ap->port_no, &ultra);
ultra &= ~(7 << (4 * adev->devno)); /* One nibble per drive */
if (adev->dma_mode >= XFER_UDMA_0) {
u8 mode = adev->dma_mode - XFER_UDMA_0 + 1 - clock;
if (mode == 0)
mode = 1;
ultra |= (mode << (4 * adev->devno));
}
pci_write_config_byte(pdev, 0x44 + ap->port_no, ultra);
}
static struct scsi_host_template artop_sht = {
ATA_BMDMA_SHT(DRV_NAME),
};
libata: implement and use ops inheritance libata lets low level drivers build ata_port_operations table and register it with libata core layer. This allows low level drivers high level of flexibility but also burdens them with lots of boilerplate entries. This becomes worse for drivers which support related similar controllers which differ slightly. They share most of the operations except for a few. However, the driver still needs to list all operations for each variant. This results in large number of duplicate entries, which is not only inefficient but also error-prone as it becomes very difficult to tell what the actual differences are. This duplicate boilerplates all over the low level drivers also make updating the core layer exteremely difficult and error-prone. When compounded with multi-branched development model, it ends up accumulating inconsistencies over time. Some of those inconsistencies cause immediate problems and fixed. Others just remain there dormant making maintenance increasingly difficult. To rectify the problem, this patch implements ata_port_operations inheritance. To allow LLDs to easily re-use their own ops tables overriding only specific methods, this patch implements poor man's class inheritance. An ops table has ->inherits field which can be set to any ops table as long as it doesn't create a loop. When the host is started, the inheritance chain is followed and any operation which isn't specified is taken from the nearest ancestor which has it specified. This operation is called finalization and done only once per an ops table and the LLD doesn't have to do anything special about it other than making the ops table non-const such that libata can update it. libata provides four base ops tables lower drivers can inherit from - base, sata, pmp, sff and bmdma. To avoid overriding these ops accidentaly, these ops are declared const and LLDs should always inherit these instead of using them directly. After finalization, all the ops table are identical before and after the patch except for setting .irq_handler to ata_interrupt in drivers which didn't use to. The .irq_handler doesn't have any actual effect and the field will soon be removed by later patch. * sata_sx4 is still using old style EH and currently doesn't take advantage of ops inheritance. Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-03-25 03:22:49 +00:00
static struct ata_port_operations artop6210_ops = {
.inherits = &ata_bmdma_port_ops,
.cable_detect = ata_cable_40wire,
.set_piomode = artop6210_set_piomode,
.set_dmamode = artop6210_set_dmamode,
libata: make reset related methods proper port operations Currently reset methods are not specified directly in the ata_port_operations table. If a LLD wants to use custom reset methods, it should construct and use a error_handler which uses those reset methods. It's done this way for two reasons. First, the ops table already contained too many methods and adding four more of them would noticeably increase the amount of necessary boilerplate code all over low level drivers. Second, as ->error_handler uses those reset methods, it can get confusing. ie. By overriding ->error_handler, those reset ops can be made useless making layering a bit hazy. Now that ops table uses inheritance, the first problem doesn't exist anymore. The second isn't completely solved but is relieved by providing default values - most drivers can just override what it has implemented and don't have to concern itself about higher level callbacks. In fact, there currently is no driver which actually modifies error handling behavior. Drivers which override ->error_handler just wraps the standard error handler only to prepare the controller for EH. I don't think making ops layering strict has any noticeable benefit. This patch makes ->prereset, ->softreset, ->hardreset, ->postreset and their PMP counterparts propoer ops. Default ops are provided in the base ops tables and drivers are converted to override individual reset methods instead of creating custom error_handler. * ata_std_error_handler() doesn't use sata_std_hardreset() if SCRs aren't accessible. sata_promise doesn't need to use separate error_handlers for PATA and SATA anymore. * softreset is broken for sata_inic162x and sata_sx4. As libata now always prefers hardreset, this doesn't really matter but the ops are forced to NULL using ATA_OP_NULL for documentation purpose. * pata_hpt374 needs to use different prereset for the first and second PCI functions. This used to be done by branching from hpt374_error_handler(). The proper way to do this is to use separate ops and port_info tables for each function. Converted. Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-03-25 03:22:50 +00:00
.prereset = artop6210_pre_reset,
};
libata: implement and use ops inheritance libata lets low level drivers build ata_port_operations table and register it with libata core layer. This allows low level drivers high level of flexibility but also burdens them with lots of boilerplate entries. This becomes worse for drivers which support related similar controllers which differ slightly. They share most of the operations except for a few. However, the driver still needs to list all operations for each variant. This results in large number of duplicate entries, which is not only inefficient but also error-prone as it becomes very difficult to tell what the actual differences are. This duplicate boilerplates all over the low level drivers also make updating the core layer exteremely difficult and error-prone. When compounded with multi-branched development model, it ends up accumulating inconsistencies over time. Some of those inconsistencies cause immediate problems and fixed. Others just remain there dormant making maintenance increasingly difficult. To rectify the problem, this patch implements ata_port_operations inheritance. To allow LLDs to easily re-use their own ops tables overriding only specific methods, this patch implements poor man's class inheritance. An ops table has ->inherits field which can be set to any ops table as long as it doesn't create a loop. When the host is started, the inheritance chain is followed and any operation which isn't specified is taken from the nearest ancestor which has it specified. This operation is called finalization and done only once per an ops table and the LLD doesn't have to do anything special about it other than making the ops table non-const such that libata can update it. libata provides four base ops tables lower drivers can inherit from - base, sata, pmp, sff and bmdma. To avoid overriding these ops accidentaly, these ops are declared const and LLDs should always inherit these instead of using them directly. After finalization, all the ops table are identical before and after the patch except for setting .irq_handler to ata_interrupt in drivers which didn't use to. The .irq_handler doesn't have any actual effect and the field will soon be removed by later patch. * sata_sx4 is still using old style EH and currently doesn't take advantage of ops inheritance. Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-03-25 03:22:49 +00:00
static struct ata_port_operations artop6260_ops = {
.inherits = &ata_bmdma_port_ops,
.cable_detect = artop6260_cable_detect,
.set_piomode = artop6260_set_piomode,
.set_dmamode = artop6260_set_dmamode,
libata: make reset related methods proper port operations Currently reset methods are not specified directly in the ata_port_operations table. If a LLD wants to use custom reset methods, it should construct and use a error_handler which uses those reset methods. It's done this way for two reasons. First, the ops table already contained too many methods and adding four more of them would noticeably increase the amount of necessary boilerplate code all over low level drivers. Second, as ->error_handler uses those reset methods, it can get confusing. ie. By overriding ->error_handler, those reset ops can be made useless making layering a bit hazy. Now that ops table uses inheritance, the first problem doesn't exist anymore. The second isn't completely solved but is relieved by providing default values - most drivers can just override what it has implemented and don't have to concern itself about higher level callbacks. In fact, there currently is no driver which actually modifies error handling behavior. Drivers which override ->error_handler just wraps the standard error handler only to prepare the controller for EH. I don't think making ops layering strict has any noticeable benefit. This patch makes ->prereset, ->softreset, ->hardreset, ->postreset and their PMP counterparts propoer ops. Default ops are provided in the base ops tables and drivers are converted to override individual reset methods instead of creating custom error_handler. * ata_std_error_handler() doesn't use sata_std_hardreset() if SCRs aren't accessible. sata_promise doesn't need to use separate error_handlers for PATA and SATA anymore. * softreset is broken for sata_inic162x and sata_sx4. As libata now always prefers hardreset, this doesn't really matter but the ops are forced to NULL using ATA_OP_NULL for documentation purpose. * pata_hpt374 needs to use different prereset for the first and second PCI functions. This used to be done by branching from hpt374_error_handler(). The proper way to do this is to use separate ops and port_info tables for each function. Converted. Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-03-25 03:22:50 +00:00
.prereset = artop6260_pre_reset,
};
/**
* artop_init_one - Register ARTOP ATA PCI device with kernel services
* @pdev: PCI device to register
* @ent: Entry in artop_pci_tbl matching with @pdev
*
* Called from kernel PCI layer.
*
* LOCKING:
* Inherited from PCI layer (may sleep).
*
* RETURNS:
* Zero on success, or -ERRNO value.
*/
static int artop_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
{
static int printed_version;
libata: clean up SFF init mess The intention of using port_mask in SFF init helpers was to eventually support exoctic configurations such as combination of legacy and native port on the same controller. This never became actually necessary and the related code always has been subtly broken one way or the other. Now that new init model is in place, there is no reason to make common helpers capable of handling all corner cases. Exotic cases can simply dealt within LLDs as necessary. This patch removes port_mask handling in SFF init helpers. SFF init helpers don't take n_ports argument and interpret it into port_mask anymore. All information is carried via port_info. n_ports argument is dropped and always two ports are allocated. LLD can tell SFF to skip certain port by marking it dummy. Note that SFF code has been treating unuvailable ports this way for a long time until recent breakage fix from Linus and is consistent with how other drivers handle with unavailable ports. This fixes 1-port legacy host handling still broken after the recent native mode fix and simplifies SFF init logic. The following changes are made... * ata_pci_init_native_host() and ata_init_legacy_host() both now try to initialized whatever they can and mark failed ports dummy. They return 0 if any port is successfully initialized. * ata_pci_prepare_native_host() and ata_pci_init_one() now doesn't take n_ports argument. All info should be specified via port_info array. Always two ports are allocated. * ata_pci_init_bmdma() exported to be used by LLDs in exotic cases. * port_info handling in all LLDs are standardized - all port_info arrays are const stack variable named ppi. Unless the second port is different from the first, its port_info is specified as NULL (tells libata that it's identical to the last non-NULL port_info). * pata_hpt37x/hpt3x2n: don't modify static variable directly. Make an on-stack copy instead as ata_piix does. * pata_uli: It has 4 ports instead of 2. Don't use ata_pci_prepare_native_host(). Allocate the host explicitly and use init helpers. It's simple enough. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-05-04 10:43:58 +00:00
static const struct ata_port_info info_6210 = {
.flags = ATA_FLAG_SLAVE_POSS,
.pio_mask = ATA_PIO4,
.mwdma_mask = ATA_MWDMA2,
.udma_mask = ATA_UDMA2,
.port_ops = &artop6210_ops,
};
libata: clean up SFF init mess The intention of using port_mask in SFF init helpers was to eventually support exoctic configurations such as combination of legacy and native port on the same controller. This never became actually necessary and the related code always has been subtly broken one way or the other. Now that new init model is in place, there is no reason to make common helpers capable of handling all corner cases. Exotic cases can simply dealt within LLDs as necessary. This patch removes port_mask handling in SFF init helpers. SFF init helpers don't take n_ports argument and interpret it into port_mask anymore. All information is carried via port_info. n_ports argument is dropped and always two ports are allocated. LLD can tell SFF to skip certain port by marking it dummy. Note that SFF code has been treating unuvailable ports this way for a long time until recent breakage fix from Linus and is consistent with how other drivers handle with unavailable ports. This fixes 1-port legacy host handling still broken after the recent native mode fix and simplifies SFF init logic. The following changes are made... * ata_pci_init_native_host() and ata_init_legacy_host() both now try to initialized whatever they can and mark failed ports dummy. They return 0 if any port is successfully initialized. * ata_pci_prepare_native_host() and ata_pci_init_one() now doesn't take n_ports argument. All info should be specified via port_info array. Always two ports are allocated. * ata_pci_init_bmdma() exported to be used by LLDs in exotic cases. * port_info handling in all LLDs are standardized - all port_info arrays are const stack variable named ppi. Unless the second port is different from the first, its port_info is specified as NULL (tells libata that it's identical to the last non-NULL port_info). * pata_hpt37x/hpt3x2n: don't modify static variable directly. Make an on-stack copy instead as ata_piix does. * pata_uli: It has 4 ports instead of 2. Don't use ata_pci_prepare_native_host(). Allocate the host explicitly and use init helpers. It's simple enough. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-05-04 10:43:58 +00:00
static const struct ata_port_info info_626x = {
.flags = ATA_FLAG_SLAVE_POSS,
.pio_mask = ATA_PIO4,
.mwdma_mask = ATA_MWDMA2,
.udma_mask = ATA_UDMA4,
.port_ops = &artop6260_ops,
};
static const struct ata_port_info info_628x = {
.flags = ATA_FLAG_SLAVE_POSS,
.pio_mask = ATA_PIO4,
.mwdma_mask = ATA_MWDMA2,
.udma_mask = ATA_UDMA5,
.port_ops = &artop6260_ops,
};
static const struct ata_port_info info_628x_fast = {
.flags = ATA_FLAG_SLAVE_POSS,
.pio_mask = ATA_PIO4,
.mwdma_mask = ATA_MWDMA2,
.udma_mask = ATA_UDMA6,
.port_ops = &artop6260_ops,
};
libata: clean up SFF init mess The intention of using port_mask in SFF init helpers was to eventually support exoctic configurations such as combination of legacy and native port on the same controller. This never became actually necessary and the related code always has been subtly broken one way or the other. Now that new init model is in place, there is no reason to make common helpers capable of handling all corner cases. Exotic cases can simply dealt within LLDs as necessary. This patch removes port_mask handling in SFF init helpers. SFF init helpers don't take n_ports argument and interpret it into port_mask anymore. All information is carried via port_info. n_ports argument is dropped and always two ports are allocated. LLD can tell SFF to skip certain port by marking it dummy. Note that SFF code has been treating unuvailable ports this way for a long time until recent breakage fix from Linus and is consistent with how other drivers handle with unavailable ports. This fixes 1-port legacy host handling still broken after the recent native mode fix and simplifies SFF init logic. The following changes are made... * ata_pci_init_native_host() and ata_init_legacy_host() both now try to initialized whatever they can and mark failed ports dummy. They return 0 if any port is successfully initialized. * ata_pci_prepare_native_host() and ata_pci_init_one() now doesn't take n_ports argument. All info should be specified via port_info array. Always two ports are allocated. * ata_pci_init_bmdma() exported to be used by LLDs in exotic cases. * port_info handling in all LLDs are standardized - all port_info arrays are const stack variable named ppi. Unless the second port is different from the first, its port_info is specified as NULL (tells libata that it's identical to the last non-NULL port_info). * pata_hpt37x/hpt3x2n: don't modify static variable directly. Make an on-stack copy instead as ata_piix does. * pata_uli: It has 4 ports instead of 2. Don't use ata_pci_prepare_native_host(). Allocate the host explicitly and use init helpers. It's simple enough. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-05-04 10:43:58 +00:00
const struct ata_port_info *ppi[] = { NULL, NULL };
int rc;
if (!printed_version++)
dev_printk(KERN_DEBUG, &pdev->dev,
"version " DRV_VERSION "\n");
rc = pcim_enable_device(pdev);
if (rc)
return rc;
if (id->driver_data == 0) { /* 6210 variant */
libata: clean up SFF init mess The intention of using port_mask in SFF init helpers was to eventually support exoctic configurations such as combination of legacy and native port on the same controller. This never became actually necessary and the related code always has been subtly broken one way or the other. Now that new init model is in place, there is no reason to make common helpers capable of handling all corner cases. Exotic cases can simply dealt within LLDs as necessary. This patch removes port_mask handling in SFF init helpers. SFF init helpers don't take n_ports argument and interpret it into port_mask anymore. All information is carried via port_info. n_ports argument is dropped and always two ports are allocated. LLD can tell SFF to skip certain port by marking it dummy. Note that SFF code has been treating unuvailable ports this way for a long time until recent breakage fix from Linus and is consistent with how other drivers handle with unavailable ports. This fixes 1-port legacy host handling still broken after the recent native mode fix and simplifies SFF init logic. The following changes are made... * ata_pci_init_native_host() and ata_init_legacy_host() both now try to initialized whatever they can and mark failed ports dummy. They return 0 if any port is successfully initialized. * ata_pci_prepare_native_host() and ata_pci_init_one() now doesn't take n_ports argument. All info should be specified via port_info array. Always two ports are allocated. * ata_pci_init_bmdma() exported to be used by LLDs in exotic cases. * port_info handling in all LLDs are standardized - all port_info arrays are const stack variable named ppi. Unless the second port is different from the first, its port_info is specified as NULL (tells libata that it's identical to the last non-NULL port_info). * pata_hpt37x/hpt3x2n: don't modify static variable directly. Make an on-stack copy instead as ata_piix does. * pata_uli: It has 4 ports instead of 2. Don't use ata_pci_prepare_native_host(). Allocate the host explicitly and use init helpers. It's simple enough. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-05-04 10:43:58 +00:00
ppi[0] = &info_6210;
ppi[1] = &ata_dummy_port_info;
/* BIOS may have left us in UDMA, clear it before libata probe */
pci_write_config_byte(pdev, 0x54, 0);
/* For the moment (also lacks dsc) */
printk(KERN_WARNING "ARTOP 6210 requires serialize functionality not yet supported by libata.\n");
printk(KERN_WARNING "Secondary ATA ports will not be activated.\n");
}
else if (id->driver_data == 1) /* 6260 */
libata: clean up SFF init mess The intention of using port_mask in SFF init helpers was to eventually support exoctic configurations such as combination of legacy and native port on the same controller. This never became actually necessary and the related code always has been subtly broken one way or the other. Now that new init model is in place, there is no reason to make common helpers capable of handling all corner cases. Exotic cases can simply dealt within LLDs as necessary. This patch removes port_mask handling in SFF init helpers. SFF init helpers don't take n_ports argument and interpret it into port_mask anymore. All information is carried via port_info. n_ports argument is dropped and always two ports are allocated. LLD can tell SFF to skip certain port by marking it dummy. Note that SFF code has been treating unuvailable ports this way for a long time until recent breakage fix from Linus and is consistent with how other drivers handle with unavailable ports. This fixes 1-port legacy host handling still broken after the recent native mode fix and simplifies SFF init logic. The following changes are made... * ata_pci_init_native_host() and ata_init_legacy_host() both now try to initialized whatever they can and mark failed ports dummy. They return 0 if any port is successfully initialized. * ata_pci_prepare_native_host() and ata_pci_init_one() now doesn't take n_ports argument. All info should be specified via port_info array. Always two ports are allocated. * ata_pci_init_bmdma() exported to be used by LLDs in exotic cases. * port_info handling in all LLDs are standardized - all port_info arrays are const stack variable named ppi. Unless the second port is different from the first, its port_info is specified as NULL (tells libata that it's identical to the last non-NULL port_info). * pata_hpt37x/hpt3x2n: don't modify static variable directly. Make an on-stack copy instead as ata_piix does. * pata_uli: It has 4 ports instead of 2. Don't use ata_pci_prepare_native_host(). Allocate the host explicitly and use init helpers. It's simple enough. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-05-04 10:43:58 +00:00
ppi[0] = &info_626x;
else if (id->driver_data == 2) { /* 6280 or 6280 + fast */
unsigned long io = pci_resource_start(pdev, 4);
u8 reg;
ppi[0] = &info_628x;
if (inb(io) & 0x10)
ppi[0] = &info_628x_fast;
/* Mac systems come up with some registers not set as we
will need them */
/* Clear reset & test bits */
pci_read_config_byte(pdev, 0x49, &reg);
pci_write_config_byte(pdev, 0x49, reg & ~ 0x30);
/* PCI latency must be > 0x80 for burst mode, tweak it
* if required.
*/
pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &reg);
if (reg <= 0x80)
pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x90);
/* Enable IRQ output and burst mode */
pci_read_config_byte(pdev, 0x4a, &reg);
pci_write_config_byte(pdev, 0x4a, (reg & ~0x01) | 0x80);
}
libata: clean up SFF init mess The intention of using port_mask in SFF init helpers was to eventually support exoctic configurations such as combination of legacy and native port on the same controller. This never became actually necessary and the related code always has been subtly broken one way or the other. Now that new init model is in place, there is no reason to make common helpers capable of handling all corner cases. Exotic cases can simply dealt within LLDs as necessary. This patch removes port_mask handling in SFF init helpers. SFF init helpers don't take n_ports argument and interpret it into port_mask anymore. All information is carried via port_info. n_ports argument is dropped and always two ports are allocated. LLD can tell SFF to skip certain port by marking it dummy. Note that SFF code has been treating unuvailable ports this way for a long time until recent breakage fix from Linus and is consistent with how other drivers handle with unavailable ports. This fixes 1-port legacy host handling still broken after the recent native mode fix and simplifies SFF init logic. The following changes are made... * ata_pci_init_native_host() and ata_init_legacy_host() both now try to initialized whatever they can and mark failed ports dummy. They return 0 if any port is successfully initialized. * ata_pci_prepare_native_host() and ata_pci_init_one() now doesn't take n_ports argument. All info should be specified via port_info array. Always two ports are allocated. * ata_pci_init_bmdma() exported to be used by LLDs in exotic cases. * port_info handling in all LLDs are standardized - all port_info arrays are const stack variable named ppi. Unless the second port is different from the first, its port_info is specified as NULL (tells libata that it's identical to the last non-NULL port_info). * pata_hpt37x/hpt3x2n: don't modify static variable directly. Make an on-stack copy instead as ata_piix does. * pata_uli: It has 4 ports instead of 2. Don't use ata_pci_prepare_native_host(). Allocate the host explicitly and use init helpers. It's simple enough. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-05-04 10:43:58 +00:00
BUG_ON(ppi[0] == NULL);
return ata_pci_sff_init_one(pdev, ppi, &artop_sht, NULL);
}
static const struct pci_device_id artop_pci_tbl[] = {
{ PCI_VDEVICE(ARTOP, 0x0005), 0 },
{ PCI_VDEVICE(ARTOP, 0x0006), 1 },
{ PCI_VDEVICE(ARTOP, 0x0007), 1 },
{ PCI_VDEVICE(ARTOP, 0x0008), 2 },
{ PCI_VDEVICE(ARTOP, 0x0009), 2 },
{ } /* terminate list */
};
static struct pci_driver artop_pci_driver = {
.name = DRV_NAME,
.id_table = artop_pci_tbl,
.probe = artop_init_one,
.remove = ata_pci_remove_one,
};
static int __init artop_init(void)
{
return pci_register_driver(&artop_pci_driver);
}
static void __exit artop_exit(void)
{
pci_unregister_driver(&artop_pci_driver);
}
module_init(artop_init);
module_exit(artop_exit);
MODULE_AUTHOR("Alan Cox");
MODULE_DESCRIPTION("SCSI low-level driver for ARTOP PATA");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, artop_pci_tbl);
MODULE_VERSION(DRV_VERSION);