Patch set updated for coreboot: soc/intel/skylake: Use intel common support to write-protect SPI flash

[Furquan Shaikh]

Furquan Shaikh ([e-mail]) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/17116

-gerrit

commit 7cfe6005293fbafd6403b68fb13d302355778ad4
Author: Furquan Shaikh 
Date:   Mon Oct 24 15:27:21 2016 -0700

soc/intel/skylake: Use intel common support to write-protect SPI flash

BUG=chrome-os-partner:58896

Change-Id: I281c799a1798f3353d78edd8a6cd16bbe762bc2c
    Signed-off-by: Furquan Shaikh 
---
 src/soc/intel/skylake/Kconfig            |  1 +
 src/soc/intel/skylake/flash_controller.c | 31 ++++---------------------------
 src/soc/intel/skylake/include/soc/spi.h  | 12 +-----------
 3 files changed, 6 insertions(+), 38 deletions(-)

diff --git a/src/soc/intel/skylake/Kconfig b/src/soc/intel/skylake/Kconfig
index 5a1d878..a5fb0e8 100644
--- a/src/soc/intel/skylake/Kconfig
+++ b/src/soc/intel/skylake/Kconfig
@@ -44,6 +44,7 @@ config CPU_SPECIFIC_OPTIONS
    select SOC_INTEL_COMMON_LPSS_I2C
    select SOC_INTEL_COMMON_NHLT
    select SOC_INTEL_COMMON_RESET
+	select SOC_INTEL_COMMON_SPI_PROTECT
    select SMM_TSEG
    select SMP
    select SSE2
diff --git a/src/soc/intel/skylake/flash_controller.c b/src/soc/intel/skylake/flash_controller.c
index 6601e6c..56c7c69 100644
--- a/src/soc/intel/skylake/flash_controller.c
+++ b/src/soc/intel/skylake/flash_controller.c
@@ -21,6 +21,7 @@
 #include <spi_flash.h>
 #include <timer.h>
 #include <soc/flash_controller.h>
+#include <soc/intel/common/spi.h>
 #include <soc/pci_devs.h>
 #include <soc/spi.h>

@@ -386,40 +387,16 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs)
    return slave;
 }

-int spi_flash_protect(u32 start, u32 size)
+int spi_get_fpr_info(struct fpr_info *info)
 {
    pch_spi_regs *spi_bar = get_spi_bar();
-	u32 end = start + size - 1;
-	u32 reg;
-	int prr;

if (!spi_bar)
    	return -1;

-	/* Find first empty PRR */
-	for (prr = 0; prr < SPI_PRR_MAX; prr++) {
-		reg = read32(&spi_bar->pr[prr]);
-		if (reg == 0)
-			break;
-	}
-	if (prr >= SPI_PRR_MAX) {
-		printk(BIOS_ERR, "ERROR: No SPI PRR free!\n");
-		return -1;
-	}
-
-	/* Set protected range base and limit */
-	reg = SPI_PRR(start, end) | SPI_PRR_WPE;
-
-	/* Set the PRR register and verify it is protected */
-	write32(&spi_bar->pr[prr], reg);
-	reg = read32(&spi_bar->pr[prr]);
-	if (!(reg & SPI_PRR_WPE)) {
-		printk(BIOS_ERR, "ERROR: Unable to set SPI PRR %d\n", prr);
-		return -1;
-	}
+	info->base = (uintptr_t)&spi_bar->pr[0];
+	info->max = SPI_FPR_MAX;

-	printk(BIOS_INFO, "%s: PRR %d is enabled for range 0x%08x-0x%08x\n",
-	       __func__, prr, start, end);
    return 0;
 }

diff --git a/src/soc/intel/skylake/include/soc/spi.h b/src/soc/intel/skylake/include/soc/spi.h
index c930b58..a92b78d 100644
--- a/src/soc/intel/skylake/include/soc/spi.h
+++ b/src/soc/intel/skylake/include/soc/spi.h
@@ -40,16 +40,7 @@
 /* STRAP Data Register*/
 #define SPIBAR_RESET_DATA 0xF8

-#define SPI_PRR_MAX		5
-#define SPI_PRR_SHIFT		12
-#define SPI_PRR_MASK		0x7fff
-#define SPI_PRR_BASE_SHIFT	0
-#define SPI_PRR_LIMIT_SHIFT	16
-#define SPI_PRR_RPE		(1 << 15) /* Read Protect */
-#define SPI_PRR_WPE		(1 << 31) /* Write Protect */
-#define SPI_PRR(base, limit)	\
-	(((((limit) >> SPI_PRR_SHIFT) & SPI_PRR_MASK) << SPI_PRR_LIMIT_SHIFT) |\
-	 ((((base) >> SPI_PRR_SHIFT) & SPI_PRR_MASK) << SPI_PRR_BASE_SHIFT))
+#define SPI_FPR_MAX		5

#define SPI_OPMENU_0 0x01 /* WRSR: Write Status Register */
 #define SPI_OPTYPE_0 0x01 /* Write, no address */
@@ -131,6 +122,5 @@
 #define  SPIBAR_BC_WPD		(1 << 0)

void *get_spi_bar(void);
-int spi_flash_protect(u32 start, u32 size);

#endif