[PATCH] Add support for AMD Promonotory (Ryzen)

[Stefan Tauner]

Signed-off-by: Stefan Tauner 
---
 chipset_enable.c |  1 +
 sb600spi.c       | 13 +++++++++----
 2 files changed, 10 insertions(+), 4 deletions(-)

This is the first and very crude version of a patch to support Ryzen.
I have no datasheet (neither does the internet AFAICT).
The patch prepares sb600_spi.c for Propmonotry support distinct from
Yangtze but does not implement any differences so far (because we don't
know any yet).

diff --git a/chipset_enable.c b/chipset_enable.c
index b181b93..72bf15b 100644
--- a/chipset_enable.c
+++ b/chipset_enable.c
@@ -1492,6 +1492,7 @@ const struct penable chipset_enables[] = {
    {0x1022, 0x7440, OK,  "AMD", "AMD-768",				enable_flash_amd_768_8111},
    {0x1022, 0x7468, OK,  "AMD", "AMD-8111",			enable_flash_amd_768_8111},
    {0x1022, 0x780e, OK,  "AMD", "FCH",				enable_flash_sb600},
+	{0x1022, 0x790e, OK,  "AMD", "Promontory",			enable_flash_sb600},
    {0x1039, 0x0406, NT,  "SiS", "501/5101/5501",			enable_flash_sis501},
    {0x1039, 0x0496, NT,  "SiS", "85C496+497",			enable_flash_sis85c496},
    {0x1039, 0x0530, OK,  "SiS", "530",				enable_flash_sis530},
diff --git a/sb600spi.c b/sb600spi.c
index 6bd5679..c4b844e 100644
--- a/sb600spi.c
+++ b/sb600spi.c
@@ -53,6 +53,7 @@ enum amd_chipset {
    CHIPSET_HUDSON234,
    CHIPSET_BOLTON,
    CHIPSET_YANGTZE,
+	CHIPSET_PROMONTORY,
 };
 static enum amd_chipset amd_gen = CHIPSET_AMD_UNKNOWN;

@@ -150,6 +151,9 @@ static void determine_generation(struct pci_dev *dev)
    			  "the output of lspci -nnvx, thanks!.\n", rev);
    	}
 #endif
+	} else if (dev->device_id == 0x790e) {
+		amd_gen = CHIPSET_PROMONTORY;
+		msg_pdbg("Promontory (Ryzen) detected.\n");
    } else
    	msg_pwarn("%s: Unknown LPC device %" PRIx16 ":%" PRIx16 ".\n"
    		  "Please report this to [e-mail] and include this log and\n"
@@ -577,7 +581,7 @@ int sb600_probe_spi(struct pci_dev *dev)
    	msg_pdbg("SpiRomEnable=%i", (tmp >> 1) & 0x1);
    	if (amd_gen == CHIPSET_SB7XX)
    		msg_pdbg(", AltSpiCSEnable=%i, AbortEnable=%i", tmp & 0x1, (tmp >> 2) & 0x1);
-		else if (amd_gen == CHIPSET_YANGTZE)
+		else if (amd_gen >= CHIPSET_YANGTZE)
    		msg_pdbg(", RouteTpm2Sp=%i", (tmp >> 3) & 0x1);

tmp = pci_read_byte(dev, 0xba);
@@ -613,13 +617,13 @@ int sb600_probe_spi(struct pci_dev *dev)
     */
    tmp = mmio_readl(sb600_spibar + 0x00);
    msg_pdbg("(0x%08" PRIx32 ") SpiArbEnable=%i", tmp, (tmp >> 19) & 0x1);
-	if (amd_gen == CHIPSET_YANGTZE)
+	if (amd_gen >= CHIPSET_YANGTZE)
    	msg_pdbg(", IllegalAccess=%i", (tmp >> 21) & 0x1);

msg_pdbg(", SpiAccessMacRomEn=%i, SpiHostAccessRomEn=%i, ArbWaitCount=%i",
    	 (tmp >> 22) & 0x1, (tmp >> 23) & 0x1, (tmp >> 24) & 0x7);

-	if (amd_gen != CHIPSET_YANGTZE)
+	if (amd_gen < CHIPSET_YANGTZE)
    	msg_pdbg(", SpiBridgeDisable=%i", (tmp >> 27) & 0x1);

switch (amd_gen) {
@@ -628,6 +632,7 @@ int sb600_probe_spi(struct pci_dev *dev)
    case CHIPSET_SB89XX:
    case CHIPSET_HUDSON234:
    case CHIPSET_YANGTZE:
+	case CHIPSET_PROMONTORY:
    	msg_pdbg(", SpiBusy=%i", (tmp >> 31) & 0x1);
    default: break;
    }
@@ -690,7 +695,7 @@ int sb600_probe_spi(struct pci_dev *dev)
    	return ERROR_FATAL;

/* Starting with Yangtze the SPI controller got a different interface with a much bigger buffer. */
-	if (amd_gen != CHIPSET_YANGTZE)
+	if (amd_gen < CHIPSET_YANGTZE)
    	register_spi_master(&spi_master_sb600);
    else
    	register_spi_master(&spi_master_yangtze);