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usb: pci-quirks: refactor AMD quirk to abstract AMD chipset types

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This patch abstracts out a AMD chipset type which includes southbridge
generation and its revision. When os excutes usb_amd_find_chipset_info
routine to initialize AMD chipset type, driver will know which kind of
chipset is used.

This update has below benifits:
- Driver is able to confirm which southbridge generations and their
  revision are used, with chipset detection once.
- To describe chipset generations with enumeration types brings better
  readability.
- It's flexible to filter AMD platforms to implement new quirks in future.

Signed-off-by: Huang Rui <ray.huang@amd.com>
Cc: Andiry Xu <andiry.xu@gmail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Huang Rui 2013-09-16 23:47:27 +08:00 committed by Greg Kroah-Hartman
parent d47aa4536d
commit 22b4f0cd1d
1 changed files with 80 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

104
drivers/usb/host/pci-quirks.c
View File

@ -79,11 +79,30 @@
#define USB_INTEL_USB3_PSSEN 0xD8
#define USB_INTEL_USB3PRM 0xDC
/*
* amd_chipset_gen values represent AMD different chipset generations
*/
enum amd_chipset_gen {
NOT_AMD_CHIPSET = 0,
AMD_CHIPSET_SB600,
AMD_CHIPSET_SB700,
AMD_CHIPSET_SB800,
AMD_CHIPSET_HUDSON2,
AMD_CHIPSET_BOLTON,
AMD_CHIPSET_YANGTZE,
AMD_CHIPSET_UNKNOWN,
};
struct amd_chipset_type {
enum amd_chipset_gen gen;
u8 rev;
};
static struct amd_chipset_info {
struct pci_dev *nb_dev;
struct pci_dev *smbus_dev;
int nb_type;
int sb_type;
struct amd_chipset_type sb_type;
int isoc_reqs;
int probe_count;
int probe_result;
@ -91,6 +110,51 @@ static struct amd_chipset_info {
static DEFINE_SPINLOCK(amd_lock);
/*
* amd_chipset_sb_type_init - initialize amd chipset southbridge type
*
* AMD FCH/SB generation and revision is identified by SMBus controller
* vendor, device and revision IDs.
*
* Returns: 1 if it is an AMD chipset, 0 otherwise.
*/
int amd_chipset_sb_type_init(struct amd_chipset_info *pinfo)
{
u8 rev = 0;
pinfo->sb_type.gen = AMD_CHIPSET_UNKNOWN;
pinfo->smbus_dev = pci_get_device(PCI_VENDOR_ID_ATI,
PCI_DEVICE_ID_ATI_SBX00_SMBUS, NULL);
if (pinfo->smbus_dev) {
rev = pinfo->smbus_dev->revision;
if (rev >= 0x10 && rev <= 0x1f)
pinfo->sb_type.gen = AMD_CHIPSET_SB600;
else if (rev >= 0x30 && rev <= 0x3f)
pinfo->sb_type.gen = AMD_CHIPSET_SB700;
else if (rev >= 0x40 && rev <= 0x4f)
pinfo->sb_type.gen = AMD_CHIPSET_SB800;
} else {
pinfo->smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD,
PCI_DEVICE_ID_AMD_HUDSON2_SMBUS, NULL);
if (!pinfo->smbus_dev) {
pinfo->sb_type.gen = NOT_AMD_CHIPSET;
return 0;
}
rev = pinfo->smbus_dev->revision;
if (rev >= 0x11 && rev <= 0x14)
pinfo->sb_type.gen = AMD_CHIPSET_HUDSON2;
else if (rev >= 0x15 && rev <= 0x18)
pinfo->sb_type.gen = AMD_CHIPSET_BOLTON;
else if (rev >= 0x39 && rev <= 0x3a)
pinfo->sb_type.gen = AMD_CHIPSET_YANGTZE;
}
pinfo->sb_type.rev = rev;
return 1;
}
void sb800_prefetch(struct device *dev, int on)
{
u16 misc;
@ -106,7 +170,6 @@ EXPORT_SYMBOL_GPL(sb800_prefetch);
int usb_amd_find_chipset_info(void)
{
u8 rev = 0;
unsigned long flags;
struct amd_chipset_info info;
int ret;
@ -122,27 +185,17 @@ int usb_amd_find_chipset_info(void)
memset(&info, 0, sizeof(info));
spin_unlock_irqrestore(&amd_lock, flags);
info.smbus_dev = pci_get_device(PCI_VENDOR_ID_ATI, 0x4385, NULL);
if (info.smbus_dev) {
rev = info.smbus_dev->revision;
if (rev >= 0x40)
info.sb_type = 1;
else if (rev >= 0x30 && rev <= 0x3b)
info.sb_type = 3;
} else {
info.smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD,
0x780b, NULL);
if (!info.smbus_dev) {
ret = 0;
goto commit;
}
rev = info.smbus_dev->revision;
if (rev >= 0x11 && rev <= 0x18)
info.sb_type = 2;
if (!amd_chipset_sb_type_init(&info)) {
ret = 0;
goto commit;
}
if (info.sb_type == 0) {
/* Below chipset generations needn't enable AMD PLL quirk */
if (info.sb_type.gen == AMD_CHIPSET_UNKNOWN ||
info.sb_type.gen == AMD_CHIPSET_SB600 ||
info.sb_type.gen == AMD_CHIPSET_YANGTZE ||
(info.sb_type.gen == AMD_CHIPSET_SB700 &&
info.sb_type.rev > 0x3b)) {
if (info.smbus_dev) {
pci_dev_put(info.smbus_dev);
info.smbus_dev = NULL;
@ -229,7 +282,9 @@ static void usb_amd_quirk_pll(int disable)
}
}
if (amd_chipset.sb_type == 1 || amd_chipset.sb_type == 2) {
if (amd_chipset.sb_type.gen == AMD_CHIPSET_SB800 ||
amd_chipset.sb_type.gen == AMD_CHIPSET_HUDSON2 ||
amd_chipset.sb_type.gen == AMD_CHIPSET_BOLTON) {
outb_p(AB_REG_BAR_LOW, 0xcd6);
addr_low = inb_p(0xcd7);
outb_p(AB_REG_BAR_HIGH, 0xcd6);
@ -240,7 +295,8 @@ static void usb_amd_quirk_pll(int disable)
outl_p(0x40, AB_DATA(addr));
outl_p(0x34, AB_INDX(addr));
val = inl_p(AB_DATA(addr));
} else if (amd_chipset.sb_type == 3) {
} else if (amd_chipset.sb_type.gen == AMD_CHIPSET_SB700 &&
amd_chipset.sb_type.rev <= 0x3b) {
pci_read_config_dword(amd_chipset.smbus_dev,
AB_REG_BAR_SB700, &addr);
outl(AX_INDXC, AB_INDX(addr));
@ -353,7 +409,7 @@ void usb_amd_dev_put(void)
amd_chipset.nb_dev = NULL;
amd_chipset.smbus_dev = NULL;
amd_chipset.nb_type = 0;
amd_chipset.sb_type = 0;
memset(&amd_chipset.sb_type, 0, sizeof(amd_chipset.sb_type));
amd_chipset.isoc_reqs = 0;
amd_chipset.probe_result = 0;