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authorPawel Moll <pawel.moll@arm.com>2012-06-12 16:14:03 +0100
committerPawel Moll <pawel.moll@arm.com>2012-07-12 16:16:56 +0100
commitd927daf5c81c9b6bf2d6a83dc4c8c60268930ee5 (patch)
treee0a45cf8833d54d2b811b1b5a9635b3b8c844084 /arch/arm
parentef5911966d2312478a74e93d993cd623a869ab10 (diff)
downloadlinux-d927daf5c81c9b6bf2d6a83dc4c8c60268930ee5.tar.bz2
ARM: vexpress: Check master site in daughterboard's sysctl operations
With recent enough motherboard firmware, core tile can be fitted in either of the two daughterboard sites. The non-DT tile code for V2P-CA9 did not check that when configuring DVI output nor setting CLCD pixel clock. Fixed now, providing "get master site" API in motherboard's code. Signed-off-by: Pawel Moll <pawel.moll@arm.com>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/mach-vexpress/ct-ca9x4.c15
-rw-r--r--arch/arm/mach-vexpress/include/mach/motherboard.h9
-rw-r--r--arch/arm/mach-vexpress/v2m.c18
3 files changed, 31 insertions, 11 deletions
diff --git a/arch/arm/mach-vexpress/ct-ca9x4.c b/arch/arm/mach-vexpress/ct-ca9x4.c
index c65cc3b462a5..ab15a5515312 100644
--- a/arch/arm/mach-vexpress/ct-ca9x4.c
+++ b/arch/arm/mach-vexpress/ct-ca9x4.c
@@ -66,8 +66,15 @@ static void __init ct_ca9x4_init_irq(void)
static void ct_ca9x4_clcd_enable(struct clcd_fb *fb)
{
- v2m_cfg_write(SYS_CFG_MUXFPGA | SYS_CFG_SITE_DB1, 0);
- v2m_cfg_write(SYS_CFG_DVIMODE | SYS_CFG_SITE_DB1, 2);
+ u32 site = v2m_get_master_site();
+
+ /*
+ * Old firmware was using the "site" component of the command
+ * to control the DVI muxer (while it should be always 0 ie. MB).
+ * Newer firmware uses the data register. Keep both for compatibility.
+ */
+ v2m_cfg_write(SYS_CFG_MUXFPGA | SYS_CFG_SITE(site), site);
+ v2m_cfg_write(SYS_CFG_DVIMODE | SYS_CFG_SITE(SYS_CFG_SITE_MB), 2);
}
static int ct_ca9x4_clcd_setup(struct clcd_fb *fb)
@@ -112,7 +119,9 @@ static long ct_round(struct clk *clk, unsigned long rate)
static int ct_set(struct clk *clk, unsigned long rate)
{
- return v2m_cfg_write(SYS_CFG_OSC | SYS_CFG_SITE_DB1 | 1, rate);
+ u32 site = v2m_get_master_site();
+
+ return v2m_cfg_write(SYS_CFG_OSC | SYS_CFG_SITE(site) | 1, rate);
}
static const struct clk_ops osc1_clk_ops = {
diff --git a/arch/arm/mach-vexpress/include/mach/motherboard.h b/arch/arm/mach-vexpress/include/mach/motherboard.h
index 31a92890893d..f004ec982d29 100644
--- a/arch/arm/mach-vexpress/include/mach/motherboard.h
+++ b/arch/arm/mach-vexpress/include/mach/motherboard.h
@@ -104,9 +104,10 @@
#define SYS_CFG_REBOOT (9 << 20)
#define SYS_CFG_DVIMODE (11 << 20)
#define SYS_CFG_POWER (12 << 20)
-#define SYS_CFG_SITE_MB (0 << 16)
-#define SYS_CFG_SITE_DB1 (1 << 16)
-#define SYS_CFG_SITE_DB2 (2 << 16)
+#define SYS_CFG_SITE(n) ((n) << 16)
+#define SYS_CFG_SITE_MB 0
+#define SYS_CFG_SITE_DB1 1
+#define SYS_CFG_SITE_DB2 2
#define SYS_CFG_STACK(n) ((n) << 12)
#define SYS_CFG_ERR (1 << 1)
@@ -122,6 +123,8 @@ void v2m_flags_set(u32 data);
#define SYS_MISC_MASTERSITE (1 << 14)
#define SYS_PROCIDx_HBI_MASK 0xfff
+int v2m_get_master_site(void);
+
/*
* Core tile IDs
*/
diff --git a/arch/arm/mach-vexpress/v2m.c b/arch/arm/mach-vexpress/v2m.c
index fde26adaef32..bb185921fce1 100644
--- a/arch/arm/mach-vexpress/v2m.c
+++ b/arch/arm/mach-vexpress/v2m.c
@@ -147,6 +147,13 @@ void __init v2m_flags_set(u32 data)
writel(data, v2m_sysreg_base + V2M_SYS_FLAGSSET);
}
+int v2m_get_master_site(void)
+{
+ u32 misc = readl(v2m_sysreg_base + V2M_SYS_MISC);
+
+ return misc & SYS_MISC_MASTERSITE ? SYS_CFG_SITE_DB2 : SYS_CFG_SITE_DB1;
+}
+
static struct resource v2m_pcie_i2c_resource = {
.start = V2M_SERIAL_BUS_PCI,
@@ -326,7 +333,8 @@ static long v2m_osc_round(struct clk *clk, unsigned long rate)
static int v2m_osc1_set(struct clk *clk, unsigned long rate)
{
- return v2m_cfg_write(SYS_CFG_OSC | SYS_CFG_SITE_MB | 1, rate);
+ return v2m_cfg_write(SYS_CFG_OSC | SYS_CFG_SITE(SYS_CFG_SITE_MB) | 1,
+ rate);
}
static const struct clk_ops osc1_clk_ops = {
@@ -404,13 +412,13 @@ static void __init v2m_init_early(void)
static void v2m_power_off(void)
{
- if (v2m_cfg_write(SYS_CFG_SHUTDOWN | SYS_CFG_SITE_MB, 0))
+ if (v2m_cfg_write(SYS_CFG_SHUTDOWN | SYS_CFG_SITE(SYS_CFG_SITE_MB), 0))
printk(KERN_EMERG "Unable to shutdown\n");
}
static void v2m_restart(char str, const char *cmd)
{
- if (v2m_cfg_write(SYS_CFG_REBOOT | SYS_CFG_SITE_MB, 0))
+ if (v2m_cfg_write(SYS_CFG_REBOOT | SYS_CFG_SITE(SYS_CFG_SITE_MB), 0))
printk(KERN_EMERG "Unable to reboot\n");
}
@@ -605,8 +613,8 @@ void __init v2m_dt_init_early(void)
/* Confirm board type against DT property, if available */
if (of_property_read_u32(allnodes, "arm,hbi", &dt_hbi) == 0) {
- u32 misc = readl(v2m_sysreg_base + V2M_SYS_MISC);
- u32 id = readl(v2m_sysreg_base + (misc & SYS_MISC_MASTERSITE ?
+ int site = v2m_get_master_site();
+ u32 id = readl(v2m_sysreg_base + (site == SYS_CFG_SITE_DB2 ?
V2M_SYS_PROCID1 : V2M_SYS_PROCID0));
u32 hbi = id & SYS_PROCIDx_HBI_MASK;