1 files changed, 30 insertions, 68 deletions

diff --git a/arch/arm/mach-davinci/psc.c b/arch/arm/mach-davinci/psc.c
index 58754f066d5b..84171abf5f7b 100644
--- a/arch/arm/mach-davinci/psc.c
+++ b/arch/arm/mach-davinci/psc.c
@@ -23,10 +23,13 @@
 #include <linux/init.h>
 #include <linux/io.h>
 
+#include <mach/cputype.h>
 #include <mach/hardware.h>
 #include <mach/psc.h>
 #include <mach/mux.h>
 
+#define DAVINCI_PWR_SLEEP_CNTRL_BASE 0x01C41000
+
 /* PSC register offsets */
 #define EPCPR           0x070
 #define PTCMD           0x120
@@ -36,102 +39,61 @@
 #define MDSTAT          0x800
 #define MDCTL           0xA00
 
-/* System control register offsets */
-#define VDD3P3V_PWDN    0x48
+#define MDSTAT_STATE_MASK 0x1f
 
-static void davinci_psc_mux(unsigned int id)
+/* Return nonzero iff the domain's clock is active */
+int __init davinci_psc_is_clk_active(unsigned int id)
 {
-        switch (id) {
-        case DAVINCI_LPSC_ATA:
-                davinci_mux_peripheral(DAVINCI_MUX_HDIREN, 1);
-                davinci_mux_peripheral(DAVINCI_MUX_ATAEN, 1);
-                break;
-        case DAVINCI_LPSC_MMC_SD:
-                /* VDD power manupulations are done in U-Boot for CPMAC
-                 * so applies to MMC as well
-                 */
-                /*Set up the pull regiter for MMC */
-                davinci_writel(0, DAVINCI_SYSTEM_MODULE_BASE + VDD3P3V_PWDN);
-                davinci_mux_peripheral(DAVINCI_MUX_MSTK, 0);
-                break;
-        case DAVINCI_LPSC_I2C:
-                davinci_mux_peripheral(DAVINCI_MUX_I2C, 1);
-                break;
-        case DAVINCI_LPSC_McBSP:
-                davinci_mux_peripheral(DAVINCI_MUX_ASP, 1);
-                break;
-        default:
-                break;
-        }
+        void __iomem *psc_base = IO_ADDRESS(DAVINCI_PWR_SLEEP_CNTRL_BASE);
+        u32 mdstat = __raw_readl(psc_base + MDSTAT + 4 * id);
+
+        /* if clocked, state can be "Enable" or "SyncReset" */
+        return mdstat & BIT(12);
 }
 
 /* Enable or disable a PSC domain */
 void davinci_psc_config(unsigned int domain, unsigned int id, char enable)
 {
-        u32 epcpr, ptcmd, ptstat, pdstat, pdctl1, mdstat, mdctl, mdstat_mask;
+        u32 epcpr, ptcmd, ptstat, pdstat, pdctl1, mdstat, mdctl;
+        void __iomem *psc_base = IO_ADDRESS(DAVINCI_PWR_SLEEP_CNTRL_BASE);
+        u32 next_state = enable ? 0x3 : 0x2; /* 0x3 enables, 0x2 disables */
 
-        mdctl = davinci_readl(DAVINCI_PWR_SLEEP_CNTRL_BASE + MDCTL + 4 * id);
-        if (enable)
-                mdctl |= 0x00000003;    /* Enable Module */
-        else
-                mdctl &= 0xFFFFFFF2;    /* Disable Module */
-        davinci_writel(mdctl, DAVINCI_PWR_SLEEP_CNTRL_BASE + MDCTL + 4 * id);
+        mdctl = __raw_readl(psc_base + MDCTL + 4 * id);
+        mdctl &= ~MDSTAT_STATE_MASK;
+        mdctl |= next_state;
+        __raw_writel(mdctl, psc_base + MDCTL + 4 * id);
 
-        pdstat = davinci_readl(DAVINCI_PWR_SLEEP_CNTRL_BASE + PDSTAT);
+        pdstat = __raw_readl(psc_base + PDSTAT);
         if ((pdstat & 0x00000001) == 0) {
-                pdctl1 = davinci_readl(DAVINCI_PWR_SLEEP_CNTRL_BASE + PDCTL1);
+                pdctl1 = __raw_readl(psc_base + PDCTL1);
                 pdctl1 |= 0x1;
-                davinci_writel(pdctl1, DAVINCI_PWR_SLEEP_CNTRL_BASE + PDCTL1);
+                __raw_writel(pdctl1, psc_base + PDCTL1);
 
                 ptcmd = 1 << domain;
-                davinci_writel(ptcmd, DAVINCI_PWR_SLEEP_CNTRL_BASE + PTCMD);
+                __raw_writel(ptcmd, psc_base + PTCMD);
 
                 do {
-                        epcpr = davinci_readl(DAVINCI_PWR_SLEEP_CNTRL_BASE +
-                                              EPCPR);
+                        epcpr = __raw_readl(psc_base + EPCPR);
                 } while ((((epcpr >> domain) & 1) == 0));
 
-                pdctl1 = davinci_readl(DAVINCI_PWR_SLEEP_CNTRL_BASE + PDCTL1);
+                pdctl1 = __raw_readl(psc_base + PDCTL1);
                 pdctl1 |= 0x100;
-                davinci_writel(pdctl1, DAVINCI_PWR_SLEEP_CNTRL_BASE + PDCTL1);
+                __raw_writel(pdctl1, psc_base + PDCTL1);
 
                 do {
-                        ptstat = davinci_readl(DAVINCI_PWR_SLEEP_CNTRL_BASE +
+                        ptstat = __raw_readl(psc_base +
                                                PTSTAT);
                 } while (!(((ptstat >> domain) & 1) == 0));
         } else {
                 ptcmd = 1 << domain;
-                davinci_writel(ptcmd, DAVINCI_PWR_SLEEP_CNTRL_BASE + PTCMD);
+                __raw_writel(ptcmd, psc_base + PTCMD);
 
                 do {
-                        ptstat = davinci_readl(DAVINCI_PWR_SLEEP_CNTRL_BASE +
-                                               PTSTAT);
+                        ptstat = __raw_readl(psc_base + PTSTAT);
                 } while (!(((ptstat >> domain) & 1) == 0));
         }
 
-        if (enable)
-                mdstat_mask = 0x3;
-        else
-                mdstat_mask = 0x2;
-
         do {
-                mdstat = davinci_readl(DAVINCI_PWR_SLEEP_CNTRL_BASE +
-                                       MDSTAT + 4 * id);
-        } while (!((mdstat & 0x0000001F) == mdstat_mask));
-
-        if (enable)
-                davinci_psc_mux(id);
-}
-
-void __init davinci_psc_init(void)
-{
-        davinci_psc_config(DAVINCI_GPSC_ARMDOMAIN, DAVINCI_LPSC_VPSSMSTR, 1);
-        davinci_psc_config(DAVINCI_GPSC_ARMDOMAIN, DAVINCI_LPSC_VPSSSLV, 1);
-        davinci_psc_config(DAVINCI_GPSC_ARMDOMAIN, DAVINCI_LPSC_TPCC, 1);
-        davinci_psc_config(DAVINCI_GPSC_ARMDOMAIN, DAVINCI_LPSC_TPTC0, 1);
-        davinci_psc_config(DAVINCI_GPSC_ARMDOMAIN, DAVINCI_LPSC_TPTC1, 1);
-        davinci_psc_config(DAVINCI_GPSC_ARMDOMAIN, DAVINCI_LPSC_GPIO, 1);
-
-        /* Turn on WatchDog timer LPSC.  Needed for RESET to work */
-        davinci_psc_config(DAVINCI_GPSC_ARMDOMAIN, DAVINCI_LPSC_TIMER2, 1);
+                mdstat = __raw_readl(psc_base + MDSTAT + 4 * id);
+        } while (!((mdstat & MDSTAT_STATE_MASK) == next_state));
 }