New patch to review for coreboot: fsp_broadwell_de: Enable Super-IO address range decode

[Werner Zeh]

Werner Zeh ([e-mail]) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/15495

-gerrit

commit 47acf27099391b30ac5f40501eb2213dcbdf198e
Author: Werner Zeh 
Date:   Wed Jun 29 07:17:21 2016 +0200

fsp_broadwell_de: Enable Super-IO address range decode

If there is an external 16550 like UART, one need to enable
    the appropriate address ranges before console_init() is called
    so that the init sequence can reach the external UART. Otherwise
    the UART will only start working in ramstage and will produce
    unreadable characters in romstage due to the lack of initialization.

Change-Id: Iafc5b5b6df14916c5ed778928521d4a8f539cf46
    Signed-off-by: Werner Zeh 
---
 src/soc/intel/fsp_broadwell_de/include/soc/lpc.h   | 4 +++-
 src/soc/intel/fsp_broadwell_de/romstage/romstage.c | 3 +++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/soc/intel/fsp_broadwell_de/include/soc/lpc.h b/src/soc/intel/fsp_broadwell_de/include/soc/lpc.h
index 2c02ebd..0408f7f 100644
--- a/src/soc/intel/fsp_broadwell_de/include/soc/lpc.h
+++ b/src/soc/intel/fsp_broadwell_de/include/soc/lpc.h
@@ -21,6 +21,8 @@
 #define REVID			0x08
 #define PIRQ_RCR1		0x60
 #define PIRQ_RCR2		0x68
+#define LPC_IO_DEC		0x80
+#define LPC_EN			0x82
 #define GEN_PMCON_1		0xA0
 #define GEN_PMCON_2		0xA2
 #define GEN_PMCON_3		0xA4
@@ -83,4 +85,4 @@
 #define   TCO_TMR_HALT		(1 << 11)
 #define TCO_TMR			0x70

-#endif /* _SOC_LPC_H_ */
\ No newline at end of file
+#endif /* _SOC_LPC_H_ */
diff --git a/src/soc/intel/fsp_broadwell_de/romstage/romstage.c b/src/soc/intel/fsp_broadwell_de/romstage/romstage.c
index dc883a4..925d284 100644
--- a/src/soc/intel/fsp_broadwell_de/romstage/romstage.c
+++ b/src/soc/intel/fsp_broadwell_de/romstage/romstage.c
@@ -48,6 +48,9 @@ static void init_rtc(void)
 void *asmlinkage main(FSP_INFO_HEADER *fsp_info_header)
 {
    post_code(0x40);
+	/* Enable decoding of I/O locations for SuperIO devices */
+	pci_write_config16(PCI_DEV(0x0, LPC_DEV, LPC_FUNC), LPC_IO_DEC, 0x0010);
+	pci_write_config16(PCI_DEV(0x0, LPC_DEV, LPC_FUNC), LPC_EN, 0x340f);
    console_init();
    init_rtc();