[PATCH 7/8] ichspi: unlock PR register restrictions if not locked down

[Stefan Tauner]

Signed-off-by: Stefan Tauner 
---
 ichspi.c |   22 ++++++++++++++++++++++
 1 files changed, 22 insertions(+), 0 deletions(-)

diff --git a/ichspi.c b/ichspi.c
index c38fbfc..a9327de 100644
--- a/ichspi.c
+++ b/ichspi.c
@@ -1507,6 +1507,24 @@ static void prettyprint_ich9_reg_pr(int i)
    	msg_pdbg(", unused)\n");
 }

+/* Set the read and write protection enable bits of PR register @i according to
+ * @read_prot and @write_prot. */
+static void ich8_set_pr(int i, int read_prot, int write_prot)
+{
+	void *addr = ich_spibar + ICH9_REG_PR0 + (i * 4);
+	uint32_t pr = mmio_readl(addr);
+
+	msg_gspew("PR%u is 0x%08x, ", i, pr);
+	pr &= ~((1 << PR_RP_OFF) | (1 << PR_WP_OFF));
+	if (read_prot)
+		pr |= (1 << PR_RP_OFF);
+	if (write_prot)
+		pr |= (1 << PR_WP_OFF);
+	msg_gspew("trying to set it to 0x%08x ", pr);
+	mmio_writel(pr, addr);
+	msg_gspew("resulted in 0x%08x.\n", mmio_readl(addr));
+}
+
 static const struct spi_programmer spi_programmer_ich7 = {
    .type = SPI_CONTROLLER_ICH7,
    .max_data_read = 64,
@@ -1648,6 +1666,10 @@ int ich_init_spi(struct pci_dev *dev, uint32_t base, void *rcrb,
    	for(i = 0; i < 5; i++)
    		do_ich9_spi_frap(tmp, i);

+		/* try to disable PR locks before printing them */
+		if (!ichspi_lock)
+			for(i = 0; i < 5; i++)
+				ich8_set_pr(i, 0, 0);
    	for(i = 0; i < 5; i++)
    		prettyprint_ich9_reg_pr(i);