diff options
| author | Laura Lawrence <Laura.Lawrence@freescale.com> | 2008-04-15 12:19:07 -0500 |
|---|---|---|
| committer | Daniel Schaeffer <daniel.schaeffer@timesys.com> | 2008-08-25 15:21:01 -0400 |
| commit | 2ac500ab6c3b7d00e7be61d8a6a70b4133840e6e (patch) | |
| tree | c5187455144b3665867daf0d6da746b9948d30b9 /arch | |
| parent | ea9d5465164f0fbb95b7de15c8b41393375b8f02 (diff) | |
ENGR00072757 Enable Access to IRAM on i.MX37
Enable access to IRAM through the SCC2 module
Signed-off-by: Laura Lawrence <Laura.Lawrence@freescale.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-mx37/devices.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/arch/arm/mach-mx37/devices.c b/arch/arm/mach-mx37/devices.c index cbe9f9649fe3..7561e1b9cf47 100644 --- a/arch/arm/mach-mx37/devices.c +++ b/arch/arm/mach-mx37/devices.c @@ -25,6 +25,7 @@ #include "iomux.h" #include <asm/arch/sdma.h> #include "sdma_script_code.h" +#include <asm/arch/mxc_scc2_driver.h> extern void gpio_spdif_active(void); @@ -210,6 +211,60 @@ static void mxc_init_scc(void) #else static inline void mxc_init_scc(void) { + uint32_t reg_value; + uint8_t *UMID_base; + uint32_t *MAP_base; + uint8_t i; + uint32_t partition_no; + void *scm_ram_base; + void *scc_base; + + scc_base = ioremap((uint32_t) SCC_BASE_ADDR, 0x140); + if (scc_base == NULL) { + printk(KERN_ERR "FAILED TO MAP IRAM REGS\n"); + return; + } + scm_ram_base = ioremap((uint32_t) IRAM_BASE_ADDR, IRAM_SIZE); + if (scm_ram_base == NULL) { + printk(KERN_ERR "FAILED TO MAP IRAM\n"); + return; + } + + for (partition_no = 0; partition_no < 9; partition_no++) { + reg_value = ((partition_no << SCM_ZCMD_PART_SHIFT) & + SCM_ZCMD_PART_MASK) | ((0x03 << + SCM_ZCMD_CCMD_SHIFT) + & SCM_ZCMD_CCMD_MASK); + __raw_writel(reg_value, scc_base + SCM_ZCMD_REG); + + while ((__raw_readl(scc_base + SCM_STATUS_REG) & + SCM_STATUS_SRS_READY) != SCM_STATUS_SRS_READY) ; + + __raw_writel(0, scc_base + (SCM_SMID0_REG + 8 * partition_no)); + + reg_value = __raw_readl(scc_base + SCM_PART_OWNERS_REG); + + if (((reg_value >> (2 * (partition_no))) & 3) != 3) { + printk(KERN_ERR "FAILED TO ACQUIRE IRAM PARTITION\n"); + iounmap(scm_ram_base); + return; + } + + MAP_base = scm_ram_base + (partition_no * 0x2000); + UMID_base = (uint8_t *) MAP_base + 0x10; + + for (i = 0; i < 16; i++) + UMID_base[i] = 0; + + MAP_base[0] = SCM_PERM_NO_ZEROIZE | SCM_PERM_HD_SUP_DISABLE | + SCM_PERM_HD_READ | SCM_PERM_HD_WRITE | + SCM_PERM_TH_READ | SCM_PERM_TH_WRITE; + + } + iounmap(scm_ram_base); + iounmap(scc_base); + printk(KERN_INFO "IRAM READY\n"); + } #endif |